Merge branch 'HelpBench'

CaseAccounting/CaseAccountingContracts/BindingModels/LawyerBindingModel.cs

@@ -1,7 +1,10 @@
-using CaseAccountingDataModels.Models;
+using CaseAccountingContracts.ViewModels;
+using CaseAccountingDataModels.Models;
+using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Net;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -17,12 +20,28 @@ namespace CaseAccountingContracts.BindingModels
 
         public int Experience { get; set; }
 
-        public int SpecializationId { get; set; }
+        public int? SpecializationId { get; set; }
 
         public int UserId { get; set; }
 
         public int Id { get; set; }
 
+        public Dictionary<int, ICaseModel> Cases { get; set; } = new();
+
+        public List<CaseViewModel> CaseViewModels { get; set; } = new();
+
         public Dictionary<int, IContractModel> Contracts { get; set; } = new();
+
+        public List<ContractViewModel> ContractViewModels { get; set; } = new();
+
+        public LawyerBindingModel() { }
+
+        [JsonConstructor]
+        public LawyerBindingModel(Dictionary<int, ContractViewModel> Contracts, Dictionary<int, CaseViewModel> Cases)
+        {
+            this.Contracts = Contracts.ToDictionary(x => x.Key, x => (IContractModel)x.Value);
+            this.Cases = Cases.ToDictionary(x => x.Key, x => (ICaseModel)x.Value);
+        }
+
     }
 }

CaseAccounting/CaseAccountingContracts/ViewModels/LawyerViewModel.cs

@@ -18,11 +18,13 @@ namespace CaseAccountingContracts.ViewModels
 		public string Patronymic { get; set; } = string.Empty;
 		[DisplayName("Опыт работы")]
 		public int Experience { get; set; }
-		public int SpecializationId { get; set; }
+		public int? SpecializationId { get; set; }
 		[DisplayName("Специализация")]
 		public string Specialization { get; set; } = string.Empty;
         public int UserId { get; set; }
         public int Id { get; set; }
         public Dictionary<int, IContractModel> Contracts { get; set; } = new();
+
+        public Dictionary<int, ICaseModel> Cases { get; set; } = new();
     }
 }

CaseAccounting/CaseAccountingCustomerView/Controllers/Lawyers.cs

@@ -1,5 +1,6 @@
 using CaseAccountingContracts.BindingModels;
 using CaseAccountingContracts.ViewModels;
+using CaseAccountingDataModels.Models;
 using Microsoft.AspNetCore.Mvc;
 
 namespace CaseAccountingCustomerView.Controllers
@@ -23,6 +24,14 @@ namespace CaseAccountingCustomerView.Controllers
                 throw new Exception("403");
             }
             lawyerModel.UserId = APIUser.User.Id;
+            lawyerModel.SpecializationId = null;
+            var dict = new Dictionary<int, IContractModel>();
+            foreach (var element in lawyerModel.ContractViewModels)
+            {
+                var contract = APIUser.GetRequest<ContractViewModel>($"api/contract/get?id={element.Id}");
+                dict.Add(element.Id, contract);
+            }
+            lawyerModel.Contracts = dict;
             APIUser.PostRequest("api/lawyer/create", lawyerModel);
             Response.Redirect("/Home/Lawyers");
         }
@@ -45,6 +54,13 @@ namespace CaseAccountingCustomerView.Controllers
                 throw new Exception("403");
             }
             lawyerModel.UserId = APIUser.User.Id;
+            var dict = new Dictionary<int, ICaseModel>();
+            foreach (var element in lawyerModel.CaseViewModels)
+            {
+                var _case = APIUser.GetRequest<CaseViewModel>($"api/case/get?id={element.Id}");
+                dict.Add(element.Id, _case);
+            }
+            lawyerModel.Cases = dict;
             APIUser.PostRequest("api/lawyer/update", lawyerModel);
             Response.Redirect("/Home/Lawyers");
         }
@@ -70,16 +86,6 @@ namespace CaseAccountingCustomerView.Controllers
             return lawyers ?? new();
         }
 
-        /*public List<EducationGroupViewModel> GetAllCases()
-        {
-            if (APIUser.User == null)
-            {
-                return new();
-            }
-            List<EducationGroupViewModel>? group = APIUser.GetRequest<List<EducationGroupViewModel>>("api/lawyer/GetAllCases");
-            return group ?? new();
-        }*/
-
         public LawyerViewModel? Get(int id)
         {
             if (APIUser.User == null)
@@ -100,6 +106,16 @@ namespace CaseAccountingCustomerView.Controllers
             return View();
         }
 
+        [HttpPost]
+        public void Bind([FromBody] LawyerBindingModel lawyerModel)
+        {
+            if (APIUser.User == null)
+            {
+                throw new Exception("403");
+            }
+            APIUser.PostRequest("api/lawyer/update", lawyerModel);
+        }
+
         public List<LawyerViewModel> GetAllByUserAndSpecialization(int specialization)
         {
             if (APIUser.User == null)
@@ -109,6 +125,17 @@ namespace CaseAccountingCustomerView.Controllers
             List<LawyerViewModel>? lawyers = APIUser.GetRequest<List<LawyerViewModel>>($"api/lawyer/getallbyuserandspecialization?userId={APIUser.User.Id}&specialization={specialization}");
             return lawyers ?? new();
         }
+
+        public List<CaseViewModel> GetAllCases()
+        {
+            if (APIUser.User == null)
+            {
+                return new();
+            }
+            List<CaseViewModel>? _case = APIUser.GetRequest<List<CaseViewModel>>("api/lawyer/GetAllCases");
+            return _case ?? new();
+        }
+
     }
 }
 

CaseAccounting/CaseAccountingCustomerView/Controllers/Specializations.cs

@@ -79,16 +79,24 @@ namespace CaseAccountingCustomerView.Controllers
             SpecializationViewModel? specialization = APIUser.GetRequest<SpecializationViewModel>($"api/specialization/get?id={id}");
             return specialization;
         }
-        
+        public IActionResult AddLawyer(int id)
-		public List<SpecializationViewModel> GetAll()
         {
-			if (APIUser.User == null)
+            if (APIUser.User == null)
-			{
+            {
-				return new();
+                return Redirect("~/Home/Enter");
-			}
+            }
-			List<SpecializationViewModel>? specializations = APIUser.GetRequest<List<SpecializationViewModel>>($"api/specialization/getall");
+            ViewBag.SpecializationId = id;
-			return specializations ?? new();
+            return View();
-		}
+        }
 
-	}
+        [HttpPost]
+        public void AddLawyer([FromBody] LawyerBindingModel lawyerModel)
+        {
+            if (APIUser.User == null)
+            {
+                throw new Exception("403");
+            }
+            APIUser.PostRequest("api/lawyer/update", lawyerModel);
+        }
+    }
 }

CaseAccounting/CaseAccountingCustomerView/Views/Home/Lawyers.cshtml

@@ -16,7 +16,7 @@
 			return;
 		}
 			<div>
-				<a class="btn btn-secondary" asp-controller="Lawyer" asp-action="Create">Добавить юриста</a>
+				<a class="btn btn-secondary" asp-controller="Lawyers" asp-action="Create">Добавить юриста</a>
 			</div>
 			<table class="table">
 				<thead>
@@ -46,13 +46,16 @@
 								@item.Name @item.Surname @item.Patronymic
 							</td>
 							<td>
-								@item.StudentCard
+								@item.Experience
 							</td>
 							<td>
-								@item.EducationStatusName
+								@item.Specialization
 							</td>
 							<td>
-								<a id="update-button-@item.Id" class="btn btn-secondary" asp-controller="Lawyer" asp-action="Update" asp-route-id="@item.Id">Изменить</a>
+								<a id="update-button-@item.Id" class="btn btn-secondary" asp-controller="Lawyers" asp-action="Bind" asp-route-id="@item.Id">Привязка</a>
+							</td>
+							<td>
+								<a id="update-button-@item.Id" class="btn btn-secondary" asp-controller="Lawyers" asp-action="Update" asp-route-id="@item.Id">Изменить</a>
 							</td>
 							<td>
 								<a id="remove-button-@item.Id" class="btn btn-secondary remove-btn" data-id="@item.Id">Удалить</a>
@@ -64,4 +67,4 @@
 	}
 </div>
 
-<script src="~/js/lawyer/lawyers.js" asp-append-version="true"></script>
+<script src="~/js/Lawyers/lawyers.js" asp-append-version="true"></script>

CaseAccounting/CaseAccountingCustomerView/Views/Home/Specializations.cshtml

@@ -44,6 +44,9 @@
 							<td>
 								@item.Name
 							</td>
+							<td>
+								<a id="add-lawyer-button-@item.Id" class="btn btn-secondary" asp-controller="Specializations" asp-action="AddLawyer" asp-route-id="@item.Id">Назначить специализацию для юриста</a>
+							</td>
 							<td>
 								<a id="update-button-@item.Id" class="btn btn-secondary" asp-controller="Specialization" asp-action="Update" asp-route-id="@item.Id">Изменить</a>
 							</td>
@@ -57,4 +60,4 @@
 	}
 </div>
 
-<script src="~/js/specialization/specializations.js" asp-append-version="true"></script>
+<script src="~/js/Specializations/specializations.js" asp-append-version="true"></script>

CaseAccounting/CaseAccountingCustomerView/Views/Lawyers/Bind.cshtml

@@ -12,7 +12,7 @@
     </div>
 
     <p class="mb-0">Название:</p>
-    <input type="text" readonly value="@ViewBag.Document.Name" id="name-input" name="name" class="form-control mb-3" />
+    <input type="text" readonly value="@ViewBag.Lawyer.Name" id="name-input" name="name" class="form-control mb-3" />
 
     <button id="create-button" type="button" class="button-primary text-button">
         Сохранить привязку
@@ -23,7 +23,7 @@
             <table class="table table-bordered">
                 <thead class="thead-light">
                     <tr>
-                        <th>Название группы:</th>
+                        <th>Название дела:</th>
                     </tr>
                 </thead>
                 <tbody id="scrollable-table__tbody">
@@ -32,4 +32,4 @@
         </div>
     </div>
 }
-<script src="~/js/document/document-bind.js" asp-append-version="true"></script>
+<script src="~/js/Lawyers/lawyer-bind.js" asp-append-version="true"></script>

CaseAccounting/CaseAccountingCustomerView/Views/Lawyers/Create.cshtml

@@ -19,8 +19,24 @@
 <p class="mb-0">Опыт работы:</p>
 <input type="number" id="experience-input" name="experience" class="form-control mb-3" />
 
+<div>
+    <div class="scrollable-table">
+        <table class="table table-bordered">
+            <thead class="thead-light">
+            <tr>
+                <th>Услуга</th>
+                <th>Цена</th>
+                <th>Дата</th>
+            </tr>
+            </thead>
+            <tbody id="scrollable-table__tbody">
+            </tbody>
+        </table>
+     </div>
+</div>
+
 <button id="create-button" type="button" class="button-primary text-button">
     Создать
 </button>
 
-<script src="~/js/lawyer/lawyer-create.js" asp-append-version="true"></script>
+<script src="~/js/Lawyers/lawyer-create.js" asp-append-version="true"></script>

CaseAccounting/CaseAccountingCustomerView/Views/Lawyers/Update.cshtml

@@ -33,4 +33,4 @@
     </button>
 }
 
-<script src="~/js/lawyer/lawyer-update.js" asp-append-version="true"></script>
+<script src="~/js/Lawyers/lawyer-update.js" asp-append-version="true"></script>

CaseAccounting/CaseAccountingCustomerView/Views/Specializations/AddLawyer.cshtml

@@ -54,4 +54,4 @@
     </div>
 }
 
-<script src="~/js/Specializations/specialization-add-student.js" asp-append-version="true"></script>
+<script src="~/js/Specializations/specializations-add-lawyer.js" asp-append-version="true"></script>

CaseAccounting/CaseAccountingCustomerView/wwwroot/js/Lawyers/lawyer-bind.js

@@ -4,48 +4,54 @@ const nameInput = document.getElementById("name-input");
 const currentLawyerId = document.getElementById("lawyer-data").dataset.id;
 var cases = [];
 var dataArray = [];
-var currentlawyer = null;
+var currentLawyer = null;
 
 window.addEventListener('load', async () => {
     await $.ajax({
-        url: "/lawyer/getallgroups",
+        url: "/lawyers/getallcases",
         type: "GET",
         contentType: "json"
     }).done((result) => {
-        groups = result;
+        cases = result;
-        console.log(groups)
+        console.log(cases)
     });
     await $.ajax({
-        url: `/document/get?id=${currentDocumentId}`,
+        url: `/lawyers/get?id=${currentLawyerId}`,
         type: "GET",
         contentType: "json"
     }).done((result) => {
-        currentDocument = result;
+        currentLawyer = result;
-        console.log(currentDocument)
     });
-    groups.forEach((group) => createRowForGroupsTable(group));
+    cases.forEach((_case) => createRowForCasesTable(_case));
 })
 
 createBtn.addEventListener('click', () => {
-    var documentGroupsUpdate = {
+    console.log("My data:")
-        "Id": currentDocument.id,
+    console.log(currentLawyer);
-        "Name": currentDocument.name,
+    console.log(dataArray);
-        "Date": currentDocument.date,
+    var lawyerCasesUpdate = {
-        "DocumentStudents": currentDocument.documentStudents,
+        "Id": currentLawyer.id,
-        "DocumentGroups": dataArray,
+        "Name": currentLawyer.name,
+        "Surname": currentLawyer.surname,
+        "Patronymic": currentLawyer.patronymic,
+        "SpecializationId": currentLawyer.specializationId,
+        "Experience": currentLawyer.experience,
+        "ContractViewModels": currentLawyer.contractViewModels,
+        "CaseViewModels": dataArray,
     }
+    console.log(lawyerCasesUpdate);
     $.ajax({
-        url: "/document/update",
+        url: "/lawyers/update",
         type: "POST",
         contentType: "application/json",
-        data: JSON.stringify(documentGroupsUpdate)
+        data: JSON.stringify(lawyerCasesUpdate)
     }).done(() => {
-        window.location.href = "/Home/Documents";
+        window.location.href = "/Home/Lawyers";
     });
 })
 
-const createRowForGroupsTable = (group) => {
+const createRowForCasesTable = (_case) => {
-    const { id, name } = group;
+    const { id, name, applicant, defendant, annotation, date, specializationId } = _case;
     const row = tbody.insertRow();
     row.setAttribute("data-id", id);
 
@@ -54,10 +60,10 @@ const createRowForGroupsTable = (group) => {
         const cell = row.insertCell();
         cell.textContent = value;
     });
-    console.log(currentDocument)
+    console.log(currentLawyer)
-    if (currentDocument.documentEdGroups?.find(x => parseInt(x.id) === parseInt(group.id))) {
+    if (currentLawyer.lawyerCases?.find(x => parseInt(x.id) === parseInt(_case.id))) {
         row.classList.add("bg-success");
-        dataArray.push(group);
+        dataArray.push(_case);
     }
 
     row.addEventListener('click', () => addAndRemoveFromList(row));
@@ -73,9 +79,9 @@ const formatDate = (dateString) => {
 
 const addAndRemoveFromList = (row) => {
     var id = parseInt(row.dataset.id);
-    var index = dataArray.indexOf(groups.find(x => x.id === id));
+    var index = dataArray.indexOf(cases.find(x => x.id === id));
     if (index === -1) {
-        dataArray.push(groups.find(x => x.id === id));
+        dataArray.push(cases.find(x => x.id === id));
         row.classList.add("bg-success");
     } else {
         dataArray.splice(index, 1);

CaseAccounting/CaseAccountingCustomerView/wwwroot/js/Lawyers/lawyer-create.js

@@ -10,12 +10,12 @@ var dataArray = [];
 
 window.addEventListener('load', () => {
     $.ajax({
-        url: "/contract/getallbyuser",
+        url: "/contracts/getallbyuser",
         type: "GET",
         contentType: "json"
     }).done((result) => {
         contracts = result;
-        contracts.forEach((contract) => createRowForStudentsTable(contract));
+        contracts.forEach((contract) => createRowForContractsTable(contract));
     });
 })
 
@@ -25,10 +25,11 @@ createBtn.addEventListener('click', () => {
         "Surname": surnameInput.value,
         "Patronymic": patronymicInput.value,
         "Experience": parseInt(experienceInput.value),
-        "LawyerContracts": dataArray,
+        "ContractViewModels": dataArray,
     }
+    console.log(lawyer);
     $.ajax({
-        url: "/lawyer/create",
+        url: "/lawyers/create",
         type: "POST",
         contentType: "application/json",
         data: JSON.stringify(lawyer)

CaseAccounting/CaseAccountingCustomerView/wwwroot/js/Lawyers/lawyer-update.js

@@ -9,14 +9,14 @@ var currentLawyer = null;
 
 window.addEventListener('load', async () => {
     await $.ajax({
-        url: "/contract/getallbyuser",
+        url: "/contracts/getallbyuser",
         type: "GET",
         contentType: "json"
     }).done((result) => {
         contracts = result;
     });
     await $.ajax({
-        url: `/lawyer/get?id=${currentLawyerId}`,
+        url: `/lawyers/get?id=${currentLawyerId}`,
         type: "GET",
         contentType: "json"
     }).done((result) => {
@@ -25,13 +25,13 @@ window.addEventListener('load', async () => {
     contracts.forEach((contract) => createRowForContractsTable(contract));
 })
 
-/*createBtn.addEventListener('click', () => {
+createBtn.addEventListener('click', () => {
     var lawyerCasesUpdate = {
         "Id": currentLawyer.id,
         "Service": serviceInput.value,
         "Coast": coastInput.value,
         "Date": currentLawyer.date,
-        "LawyerContracts": dataArray,
+        "ContractViewModels": dataArray,
         "LawyerCases": currentLawyer.lawyerCases,
     }
     $.ajax({
@@ -42,7 +42,7 @@ window.addEventListener('load', async () => {
     }).done(() => {
         window.location.href = "/Home/Lawyers";
     });
-})*/
+})
 
 const createRowForContractsTable = (contract) => {
     const { id, service, coast, date} = contract;

CaseAccounting/CaseAccountingCustomerView/wwwroot/js/Lawyers/lawyers.js

@@ -10,7 +10,7 @@ removeButtons.forEach(function (button) {
         var result = confirm("Вы уверены, что хотите удалить эту запись?");
         if (result) {
             $.ajax({
-                url: "/lawyer/delete",
+                url: "/lawyers/delete",
                 type: "POST",
                 data: { Id: id }
             }).done(() => {

CaseAccounting/CaseAccountingCustomerView/wwwroot/js/Specializations/specializations-add-lawyer.js

@@ -16,6 +16,7 @@ window.addEventListener("load", async () => {
         });
         lawyers = lawyersResponse;
 
+        console.log(lawyers);
         lawyers.forEach((lawyer) => {
             createLawyerOption(lawyer);
         });

CaseAccounting/CaseAccountingDataBaseImplement/CaseAccountingDatabase.cs

@@ -18,8 +18,8 @@ namespace CaseAccountingDataBaseImplement
                     Host=localhost;
                     Port=5432;
                     Database=CaseAccountingDatabase;
-                    Username=courseuser;
+                    Username=postgres;
-                    Password=courseuser");
+                    Password=postgres");
             }
             base.OnConfiguring(optionsBuilder);
         }

CaseAccounting/CaseAccountingDataBaseImplement/Implements/LawyerStorage.cs

@@ -123,9 +123,12 @@ namespace CaseAccountingDataBaseImplement.Implements
                 {
                     return null;
                 }
-                lawyer.Update(model);
+                lawyer.Update(context, model);
                 context.SaveChanges();
-                lawyer.UpdateContracts(context, model);
+                if (model.Cases.Count > 0)
+                {
+                    lawyer.UpdateContracts(context, model);
+                }
                 transaction.Commit();
                 return lawyer.GetViewModel;
             }

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/20230519143905_migrSpecializationNull.Designer.cs

@@ -0,0 +1,554 @@
+// <auto-generated />
+using System;
+using CaseAccountingDataBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace CaseAccountingDataBaseImplement.Migrations
+{
+    [DbContext(typeof(CaseAccountingDatabase))]
+    [Migration("20230519143905_migrSpecializationNull")]
+    partial class migrSpecializationNull
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.5")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Annotation")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Applicant")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Defendant")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SpecializationId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SpecializationId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Cases");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseDeal", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("DealId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("DealId");
+
+                    b.ToTable("CaseDeals");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseLawyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("LawyerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("LawyerId");
+
+                    b.ToTable("CaseLawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<decimal>("Coast")
+                        .HasColumnType("numeric");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Service")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Contracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Responsibilities")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Subject")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Deals");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.DealContract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ContractId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("DealId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContractId");
+
+                    b.HasIndex("DealId");
+
+                    b.ToTable("DealContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Hearing", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Information")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Hearings");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Experience")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Patronymic")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int?>("SpecializationId")
+                        .IsRequired()
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Surname")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SpecializationId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Lawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.LawyerContract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ContractId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("LawyerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContractId");
+
+                    b.HasIndex("LawyerId");
+
+                    b.ToTable("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Specializations");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Login")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
+                        .WithMany("Cases")
+                        .HasForeignKey("SpecializationId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Cases")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Specialization");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseDeal", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("Deals")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Deal", "Deal")
+                        .WithMany("CaseDeals")
+                        .HasForeignKey("DealId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("Deal");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseLawyer", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("CaseLawyers")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Lawyer", "Lawyer")
+                        .WithMany("CaseLawyers")
+                        .HasForeignKey("LawyerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("Lawyer");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Contracts")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Deals")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.DealContract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Contract", "Contract")
+                        .WithMany("DealContracts")
+                        .HasForeignKey("ContractId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Deal", "Deal")
+                        .WithMany("Contracts")
+                        .HasForeignKey("DealId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Contract");
+
+                    b.Navigation("Deal");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Hearing", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("Hearings")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Hearings")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
+                        .WithMany("Lawyers")
+                        .HasForeignKey("SpecializationId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Lawyers")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Specialization");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.LawyerContract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Contract", "Contract")
+                        .WithMany("LawyerContracts")
+                        .HasForeignKey("ContractId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Lawyer", "Lawyer")
+                        .WithMany("LawyerContracts")
+                        .HasForeignKey("LawyerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Contract");
+
+                    b.Navigation("Lawyer");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Specializations")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.Navigation("CaseLawyers");
+
+                    b.Navigation("Deals");
+
+                    b.Navigation("Hearings");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.Navigation("DealContracts");
+
+                    b.Navigation("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.Navigation("CaseDeals");
+
+                    b.Navigation("Contracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.Navigation("CaseLawyers");
+
+                    b.Navigation("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.Navigation("Cases");
+
+                    b.Navigation("Lawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.User", b =>
+                {
+                    b.Navigation("Cases");
+
+                    b.Navigation("Contracts");
+
+                    b.Navigation("Deals");
+
+                    b.Navigation("Hearings");
+
+                    b.Navigation("Lawyers");
+
+                    b.Navigation("Specializations");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/20230519143905_migrSpecializationNull.cs

@@ -0,0 +1,22 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CaseAccountingDataBaseImplement.Migrations
+{
+    /// <inheritdoc />
+    public partial class migrSpecializationNull : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+
+        }
+    }
+}

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/20230519145356_migrSpecializationNullAttempt2.Designer.cs

@@ -0,0 +1,551 @@
+// <auto-generated />
+using System;
+using CaseAccountingDataBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace CaseAccountingDataBaseImplement.Migrations
+{
+    [DbContext(typeof(CaseAccountingDatabase))]
+    [Migration("20230519145356_migrSpecializationNullAttempt2")]
+    partial class migrSpecializationNullAttempt2
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.5")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Annotation")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Applicant")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Defendant")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SpecializationId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SpecializationId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Cases");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseDeal", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("DealId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("DealId");
+
+                    b.ToTable("CaseDeals");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseLawyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("LawyerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("LawyerId");
+
+                    b.ToTable("CaseLawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<decimal>("Coast")
+                        .HasColumnType("numeric");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Service")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Contracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Responsibilities")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Subject")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Deals");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.DealContract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ContractId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("DealId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContractId");
+
+                    b.HasIndex("DealId");
+
+                    b.ToTable("DealContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Hearing", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Information")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Hearings");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Experience")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Patronymic")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int?>("SpecializationId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Surname")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SpecializationId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Lawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.LawyerContract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ContractId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("LawyerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContractId");
+
+                    b.HasIndex("LawyerId");
+
+                    b.ToTable("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Specializations");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Login")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
+                        .WithMany("Cases")
+                        .HasForeignKey("SpecializationId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Cases")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Specialization");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseDeal", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("Deals")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Deal", "Deal")
+                        .WithMany("CaseDeals")
+                        .HasForeignKey("DealId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("Deal");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseLawyer", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("CaseLawyers")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Lawyer", "Lawyer")
+                        .WithMany("CaseLawyers")
+                        .HasForeignKey("LawyerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("Lawyer");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Contracts")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Deals")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.DealContract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Contract", "Contract")
+                        .WithMany("DealContracts")
+                        .HasForeignKey("ContractId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Deal", "Deal")
+                        .WithMany("Contracts")
+                        .HasForeignKey("DealId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Contract");
+
+                    b.Navigation("Deal");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Hearing", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("Hearings")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Hearings")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
+                        .WithMany("Lawyers")
+                        .HasForeignKey("SpecializationId");
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Lawyers")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Specialization");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.LawyerContract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Contract", "Contract")
+                        .WithMany("LawyerContracts")
+                        .HasForeignKey("ContractId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Lawyer", "Lawyer")
+                        .WithMany("LawyerContracts")
+                        .HasForeignKey("LawyerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Contract");
+
+                    b.Navigation("Lawyer");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Specializations")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.Navigation("CaseLawyers");
+
+                    b.Navigation("Deals");
+
+                    b.Navigation("Hearings");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.Navigation("DealContracts");
+
+                    b.Navigation("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.Navigation("CaseDeals");
+
+                    b.Navigation("Contracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.Navigation("CaseLawyers");
+
+                    b.Navigation("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.Navigation("Cases");
+
+                    b.Navigation("Lawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.User", b =>
+                {
+                    b.Navigation("Cases");
+
+                    b.Navigation("Contracts");
+
+                    b.Navigation("Deals");
+
+                    b.Navigation("Hearings");
+
+                    b.Navigation("Lawyers");
+
+                    b.Navigation("Specializations");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/20230519145356_migrSpecializationNullAttempt2.cs

@@ -0,0 +1,59 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CaseAccountingDataBaseImplement.Migrations
+{
+    /// <inheritdoc />
+    public partial class migrSpecializationNullAttempt2 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Lawyers_Specializations_SpecializationId",
+                table: "Lawyers");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "SpecializationId",
+                table: "Lawyers",
+                type: "integer",
+                nullable: true,
+                oldClrType: typeof(int),
+                oldType: "integer");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Lawyers_Specializations_SpecializationId",
+                table: "Lawyers",
+                column: "SpecializationId",
+                principalTable: "Specializations",
+                principalColumn: "Id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Lawyers_Specializations_SpecializationId",
+                table: "Lawyers");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "SpecializationId",
+                table: "Lawyers",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0,
+                oldClrType: typeof(int),
+                oldType: "integer",
+                oldNullable: true);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Lawyers_Specializations_SpecializationId",
+                table: "Lawyers",
+                column: "SpecializationId",
+                principalTable: "Specializations",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+    }
+}

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/20230519162440_migrBindTry1.Designer.cs

@@ -0,0 +1,551 @@
+// <auto-generated />
+using System;
+using CaseAccountingDataBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace CaseAccountingDataBaseImplement.Migrations
+{
+    [DbContext(typeof(CaseAccountingDatabase))]
+    [Migration("20230519162440_migrBindTry1")]
+    partial class migrBindTry1
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.5")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Annotation")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Applicant")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Defendant")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SpecializationId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SpecializationId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Cases");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseDeal", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("DealId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("DealId");
+
+                    b.ToTable("CaseDeals");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseLawyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("LawyerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("LawyerId");
+
+                    b.ToTable("CaseLawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<decimal>("Coast")
+                        .HasColumnType("numeric");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Service")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Contracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Responsibilities")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Subject")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Deals");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.DealContract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ContractId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("DealId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContractId");
+
+                    b.HasIndex("DealId");
+
+                    b.ToTable("DealContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Hearing", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Information")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Hearings");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Experience")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Patronymic")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int?>("SpecializationId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Surname")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SpecializationId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Lawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.LawyerContract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ContractId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("LawyerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContractId");
+
+                    b.HasIndex("LawyerId");
+
+                    b.ToTable("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Specializations");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Login")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
+                        .WithMany("Cases")
+                        .HasForeignKey("SpecializationId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Cases")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Specialization");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseDeal", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("Deals")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Deal", "Deal")
+                        .WithMany("CaseDeals")
+                        .HasForeignKey("DealId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("Deal");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseLawyer", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("CaseLawyers")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Lawyer", "Lawyer")
+                        .WithMany("CaseLawyers")
+                        .HasForeignKey("LawyerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("Lawyer");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Contracts")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Deals")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.DealContract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Contract", "Contract")
+                        .WithMany("DealContracts")
+                        .HasForeignKey("ContractId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Deal", "Deal")
+                        .WithMany("Contracts")
+                        .HasForeignKey("DealId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Contract");
+
+                    b.Navigation("Deal");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Hearing", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("Hearings")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Hearings")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
+                        .WithMany("Lawyers")
+                        .HasForeignKey("SpecializationId");
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Lawyers")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Specialization");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.LawyerContract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Contract", "Contract")
+                        .WithMany("LawyerContracts")
+                        .HasForeignKey("ContractId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Lawyer", "Lawyer")
+                        .WithMany("LawyerContracts")
+                        .HasForeignKey("LawyerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Contract");
+
+                    b.Navigation("Lawyer");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Specializations")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.Navigation("CaseLawyers");
+
+                    b.Navigation("Deals");
+
+                    b.Navigation("Hearings");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.Navigation("DealContracts");
+
+                    b.Navigation("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.Navigation("CaseDeals");
+
+                    b.Navigation("Contracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.Navigation("CaseLawyers");
+
+                    b.Navigation("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.Navigation("Cases");
+
+                    b.Navigation("Lawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.User", b =>
+                {
+                    b.Navigation("Cases");
+
+                    b.Navigation("Contracts");
+
+                    b.Navigation("Deals");
+
+                    b.Navigation("Hearings");
+
+                    b.Navigation("Lawyers");
+
+                    b.Navigation("Specializations");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/20230519162440_migrBindTry1.cs

@@ -0,0 +1,22 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CaseAccountingDataBaseImplement.Migrations
+{
+    /// <inheritdoc />
+    public partial class migrBindTry1 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+
+        }
+    }
+}

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/20230519172138_migrBindTry2.Designer.cs

@@ -0,0 +1,551 @@
+// <auto-generated />
+using System;
+using CaseAccountingDataBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace CaseAccountingDataBaseImplement.Migrations
+{
+    [DbContext(typeof(CaseAccountingDatabase))]
+    [Migration("20230519172138_migrBindTry2")]
+    partial class migrBindTry2
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.5")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Annotation")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Applicant")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Defendant")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SpecializationId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SpecializationId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Cases");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseDeal", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("DealId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("DealId");
+
+                    b.ToTable("CaseDeals");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseLawyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("LawyerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("LawyerId");
+
+                    b.ToTable("CaseLawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<decimal>("Coast")
+                        .HasColumnType("numeric");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Service")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Contracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Responsibilities")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Subject")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Deals");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.DealContract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ContractId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("DealId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContractId");
+
+                    b.HasIndex("DealId");
+
+                    b.ToTable("DealContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Hearing", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CaseId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Information")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CaseId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Hearings");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Experience")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Patronymic")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int?>("SpecializationId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Surname")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SpecializationId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Lawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.LawyerContract", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ContractId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("LawyerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContractId");
+
+                    b.HasIndex("LawyerId");
+
+                    b.ToTable("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Specializations");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Login")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
+                        .WithMany("Cases")
+                        .HasForeignKey("SpecializationId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Cases")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Specialization");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseDeal", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("Deals")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Deal", "Deal")
+                        .WithMany("CaseDeals")
+                        .HasForeignKey("DealId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("Deal");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.CaseLawyer", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("CaseLawyers")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Lawyer", "Lawyer")
+                        .WithMany("CaseLawyers")
+                        .HasForeignKey("LawyerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("Lawyer");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Contracts")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Deals")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.DealContract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Contract", "Contract")
+                        .WithMany("DealContracts")
+                        .HasForeignKey("ContractId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Deal", "Deal")
+                        .WithMany("Contracts")
+                        .HasForeignKey("DealId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Contract");
+
+                    b.Navigation("Deal");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Hearing", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Case", "Case")
+                        .WithMany("Hearings")
+                        .HasForeignKey("CaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Hearings")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Case");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
+                        .WithMany("Lawyers")
+                        .HasForeignKey("SpecializationId");
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Lawyers")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Specialization");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.LawyerContract", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Contract", "Contract")
+                        .WithMany("LawyerContracts")
+                        .HasForeignKey("ContractId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.Lawyer", "Lawyer")
+                        .WithMany("LawyerContracts")
+                        .HasForeignKey("LawyerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Contract");
+
+                    b.Navigation("Lawyer");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
+                        .WithMany("Specializations")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Case", b =>
+                {
+                    b.Navigation("CaseLawyers");
+
+                    b.Navigation("Deals");
+
+                    b.Navigation("Hearings");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Contract", b =>
+                {
+                    b.Navigation("DealContracts");
+
+                    b.Navigation("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Deal", b =>
+                {
+                    b.Navigation("CaseDeals");
+
+                    b.Navigation("Contracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Lawyer", b =>
+                {
+                    b.Navigation("CaseLawyers");
+
+                    b.Navigation("LawyerContracts");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.Specialization", b =>
+                {
+                    b.Navigation("Cases");
+
+                    b.Navigation("Lawyers");
+                });
+
+            modelBuilder.Entity("CaseAccountingDataBaseImplement.Models.User", b =>
+                {
+                    b.Navigation("Cases");
+
+                    b.Navigation("Contracts");
+
+                    b.Navigation("Deals");
+
+                    b.Navigation("Hearings");
+
+                    b.Navigation("Lawyers");
+
+                    b.Navigation("Specializations");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/20230519172138_migrBindTry2.cs

@@ -0,0 +1,22 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CaseAccountingDataBaseImplement.Migrations
+{
+    /// <inheritdoc />
+    public partial class migrBindTry2 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+
+        }
+    }
+}

CaseAccounting/CaseAccountingDataBaseImplement/Migrations/CaseAccountingDatabaseModelSnapshot.cs

@@ -239,7 +239,7 @@ namespace CaseAccountingDataBaseImplement.Migrations
                         .IsRequired()
                         .HasColumnType("text");
 
-                    b.Property<int>("SpecializationId")
+                    b.Property<int?>("SpecializationId")
                         .HasColumnType("integer");
 
                     b.Property<string>("Surname")
@@ -448,9 +448,7 @@ namespace CaseAccountingDataBaseImplement.Migrations
                 {
                     b.HasOne("CaseAccountingDataBaseImplement.Models.Specialization", "Specialization")
                         .WithMany("Lawyers")
-                        .HasForeignKey("SpecializationId")
+                        .HasForeignKey("SpecializationId");
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
 
                     b.HasOne("CaseAccountingDataBaseImplement.Models.User", "User")
                         .WithMany("Lawyers")

CaseAccounting/CaseAccountingDataBaseImplement/Models/Lawyer.cs

@@ -27,9 +27,8 @@ namespace CaseAccountingDataBaseImplement.Models
         [Required]
         public int Experience { get; set; }
 
-        [Required]
+        public int? SpecializationId { get; set; }
-        public int SpecializationId { get; set; }
+        public virtual Specialization? Specialization { get; set; } = new();
-        public virtual Specialization Specialization { get; set; } = new();
 
         [Required]
         public int UserId { get; set; }
@@ -38,6 +37,22 @@ namespace CaseAccountingDataBaseImplement.Models
         [ForeignKey("LawyerId")]
         public virtual List<CaseLawyer> CaseLawyers { get; set; } = new();
 
+        private Dictionary<int, ICaseModel>? _cases;
+
+        [NotMapped]
+        public Dictionary<int, ICaseModel> Cases
+        {
+            get 
+            {
+                if (_cases == null)
+                {
+                    _cases = CaseLawyers.ToDictionary(
+                        x => x.CaseId, x => x.Case as ICaseModel);
+                }
+                return _cases;
+            }
+        }
+
         [ForeignKey("LawyerId")]
         public virtual List<LawyerContract> LawyerContracts { get; set; } = new();
 
@@ -71,13 +86,17 @@ namespace CaseAccountingDataBaseImplement.Models
                 Patronymic = model.Patronymic,
                 Experience = model.Experience,
                 SpecializationId = model.SpecializationId,
-                Specialization = context.Specializations.FirstOrDefault(x => x.Id == model.SpecializationId) ?? throw new Exception("specialization not found"),
+                Specialization = context.Specializations.FirstOrDefault(x => model.SpecializationId.HasValue && x.Id == model.SpecializationId),
                 UserId = model.UserId,
-                User = context.Users.FirstOrDefault(x => x.Id == model.UserId) ?? throw new Exception("User not found")
+                User = context.Users.FirstOrDefault(x => x.Id == model.UserId) ?? throw new Exception("User not found"),
+                LawyerContracts = model.Contracts.Select(x => new LawyerContract
+                {
+                    Contract = context.Contracts.First(y => y.Id == x.Key)
+                }).ToList()
             };
         }
 
-        public void Update(LawyerBindingModel? model)
+        public void Update(CaseAccountingDatabase context, LawyerBindingModel? model)
         {
             if (model == null)
             {
@@ -88,6 +107,13 @@ namespace CaseAccountingDataBaseImplement.Models
             Patronymic = model.Patronymic;
             Experience = model.Experience;
             SpecializationId = model.SpecializationId;
+            if (model.Cases.Count > 0)
+            {
+                CaseLawyers = model.Cases.Select(x => new CaseLawyer
+                {
+                    Case = context.Cases.First(y => y.Id == x.Key)
+                }).ToList();
+            }
         }
 
         public void UpdateContracts(CaseAccountingDatabase context, LawyerBindingModel model)
@@ -122,6 +148,38 @@ namespace CaseAccountingDataBaseImplement.Models
             }
         }
 
+        public void UpdateCases(CaseAccountingDatabase context, LawyerBindingModel model)
+        {
+            var lawyerCases = context.CaseLawyers
+                .Where(x => x.LawyerId == model.Id)
+                .ToList();
+            if (lawyerCases != null)
+            {
+                context.CaseLawyers
+                    .RemoveRange(lawyerCases
+                            .Where(x => !model.Cases
+                            .ContainsKey(x.CaseId))
+                        );
+                context.SaveChanges();
+                var lawyer = context.Lawyers
+                    .First(x => x.Id == Id);
+                foreach (var lc in lawyerCases)
+                {
+                    model.Cases.Remove(lc.CaseId);
+                }
+                foreach (var lc in model.Cases)
+                {
+                    context.CaseLawyers.Add(new CaseLawyer
+                    {
+                        Lawyer = lawyer,
+                        Case = context.Cases.First(x => x.Id == lc.Key),
+                    });
+                    context.SaveChanges();
+                }
+                _contracts = null;
+            }
+        }
+
         public LawyerViewModel GetViewModel => new()
         {
             Id = Id,
@@ -130,7 +188,8 @@ namespace CaseAccountingDataBaseImplement.Models
             Patronymic = Patronymic,
             Experience = Experience,
             SpecializationId = SpecializationId,
-            UserId = UserId
+            UserId = UserId,
+            Specialization = Specialization?.Name ?? "Не указан"
         };
     }
 }

CaseAccounting/CaseAccountingDataModels/Models/ILawyerModel.cs

@@ -12,7 +12,7 @@ namespace CaseAccountingDataModels.Models
 		string Surname { get; }	
 		string Patronymic { get; }
 		int Experience { get; }
-		int SpecializationId { get; }
+		int? SpecializationId { get; }
         int UserId { get; }
         Dictionary<int, IContractModel> Contracts { get; }
     }

CaseAccounting/CaseAccountingRestApi/Controllers/LawyerController.cs

@@ -12,9 +12,12 @@ namespace CaseAccountingRestApi.Controllers
     {
         private readonly ILawyerLogic lawyerLogic;
 
-        public LawyerController(ILawyerLogic logic)
+        private readonly ICaseLogic _caseLogic;
+
+        public LawyerController(ILawyerLogic logic, ICaseLogic caseLogic)
         {
             lawyerLogic = logic;
+            _caseLogic = caseLogic;
         }
 
         [HttpGet]
@@ -81,5 +84,31 @@ namespace CaseAccountingRestApi.Controllers
                 throw;
             }
         }
+
+        [HttpGet]
+        public List<CaseViewModel>? GetAllCases()
+        {
+            try
+            {
+                return _caseLogic.ReadList(null);
+            }
+            catch (Exception ex)
+            {
+                throw;
+            }
+        }
+
+        [HttpGet]
+        public List<LawyerViewModel>? GetAllByUserAndSpecialization(int userId, int specialization)
+        {
+            try
+            {
+                return lawyerLogic.ReadList(new LawyerSearchModel { UserId = userId, SpecializationId = specialization });
+            }
+            catch (Exception ex)
+            {
+                throw;
+            }
+        }
     }
 }