Lab3 done i guess...

ComputersShop/ComputersShop.sln

@@ -13,7 +13,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputersShopListImplement"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputersShopView", "ComputersShopView\ComputersShopView.csproj", "{B0416A4B-CD04-4991-BC00-7FCFC9DEEF73}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ComputersShopFileImplement", "ComputersShopFileImplement\ComputersShopFileImplement.csproj", "{58BB53D3-F224-451F-B9BD-D1D67ACE7F23}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputersShopFileImplement", "ComputersShopFileImplement\ComputersShopFileImplement.csproj", "{58BB53D3-F224-451F-B9BD-D1D67ACE7F23}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ComputersShopDataBaseImplement", "ComputersShopDataBaseImplement\ComputersShopDataBaseImplement.csproj", "{E714779D-9239-4CA8-87FA-DB7FC83E45BF}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -45,6 +47,10 @@ Global
 		{58BB53D3-F224-451F-B9BD-D1D67ACE7F23}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{58BB53D3-F224-451F-B9BD-D1D67ACE7F23}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{58BB53D3-F224-451F-B9BD-D1D67ACE7F23}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E714779D-9239-4CA8-87FA-DB7FC83E45BF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E714779D-9239-4CA8-87FA-DB7FC83E45BF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E714779D-9239-4CA8-87FA-DB7FC83E45BF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E714779D-9239-4CA8-87FA-DB7FC83E45BF}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

ComputersShop/ComputersShopBusinessLogic/BusinessLogics/OrderLogic.cs

@@ -52,7 +52,7 @@ namespace ComputersShopBusinessLogic.BusinessLogics
                 return false;
             }
             model.Status = newStatus;
-            if (model.Status == OrderStatus.Готов) model.DateImplement = DateTime.Now;
+            if (model.Status == OrderStatus.Готов) model.DateImplement = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Utc);
             else
             {
                 model.DateImplement = viewModel.DateImplement;

ComputersShop/ComputersShopContracts/BindingModels/OrderBindingModel.cs

@@ -15,7 +15,7 @@ namespace ComputersShopContracts.BindingModels
         public int Count { get; set; }
         public double Sum { get; set; }
         public OrderStatus Status { get; set; } = OrderStatus.Неизвестен;
-        public DateTime DateCreate { get; set; } = DateTime.Now;
+        public DateTime DateCreate { get; set; } = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Utc);
         public DateTime? DateImplement { get; set; }
     }
 }

ComputersShop/ComputersShopDataBaseImplement/ComputersShopDataBase.cs

@@ -0,0 +1,27 @@
+using Microsoft.EntityFrameworkCore;
+using ComputersShopDataBaseImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputersShopDataBaseImplement
+{
+    public class ComputersShopDataBase : DbContext
+    {
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            if (optionsBuilder.IsConfigured == false)
+            {
+                optionsBuilder.UseNpgsql(@"Host=localhost;Port=5432;Database=ComputersShopDatabaseFull;Username=postgres;Password=hellothere132");
+            }
+            base.OnConfiguring(optionsBuilder);
+        }
+        public virtual DbSet<Component> Components { set; get; }
+        public virtual DbSet<Computer> Computers { set; get; }
+        public virtual DbSet<ComputerComponent> ComputerComponents { set; get; }
+        public virtual DbSet<Order> Orders { set; get; }
+    }
+}
+

ComputersShop/ComputersShopDataBaseImplement/ComputersShopDataBaseImplement.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ComputersShopContracts\ComputersShopContracts.csproj" />
+    <ProjectReference Include="..\СomputersShopDataModels\СomputersShopDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

ComputersShop/ComputersShopDataBaseImplement/Implements/ComponentStorage.cs

@@ -0,0 +1,89 @@
+using ComputersShopContracts.BindingModels;
+using ComputersShopContracts.SearchModels;
+using ComputersShopContracts.StoragesContracts;
+using ComputersShopContracts.ViewModels;
+using ComputersShopDataBaseImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputersShopDataBaseImplement.Implements
+{
+    public class ComponentStorage : IComponentStorage
+    {
+        public List<ComponentViewModel> GetFullList()
+        {
+            using var context = new ComputersShopDataBase();
+            return context.Components
+            .Select(x => x.GetViewModel)
+           .ToList();
+        }
+        public List<ComponentViewModel> GetFilteredList(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName))
+            {
+                return new();
+            }
+            using var context = new ComputersShopDataBase();
+            return context.Components
+            .Where(x => x.ComponentName.Contains(model.ComponentName))
+           .Select(x => x.GetViewModel)
+           .ToList();
+        }
+        public ComponentViewModel? GetElement(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputersShopDataBase();
+            return context.Components
+            .FirstOrDefault(x =>
+           (!string.IsNullOrEmpty(model.ComponentName) && x.ComponentName ==
+           model.ComponentName) ||
+            (model.Id.HasValue && x.Id == model.Id))
+            ?.GetViewModel;
+        }
+        public ComponentViewModel? Insert(ComponentBindingModel model)
+        {
+            var newComponent = Component.Create(model);
+            if (newComponent == null)
+            {
+                return null;
+            }
+            using var context = new ComputersShopDataBase();
+            context.Components.Add(newComponent);
+            context.SaveChanges();
+            return newComponent.GetViewModel;
+        }
+        public ComponentViewModel? Update(ComponentBindingModel model)
+        {
+            using var context = new ComputersShopDataBase();
+            var Component = context.Components.FirstOrDefault(x => x.Id ==
+           model.Id);
+            if (Component == null)
+            {
+                return null;
+            }
+            Component.Update(model);
+            context.SaveChanges();
+            return Component.GetViewModel;
+        }
+        public ComponentViewModel? Delete(ComponentBindingModel model)
+        {
+            using var context = new ComputersShopDataBase();
+            var element = context.Components.FirstOrDefault(rec => rec.Id ==
+           model.Id);
+            if (element != null)
+            {
+                context.Components.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+    }
+}

ComputersShop/ComputersShopDataBaseImplement/Implements/ComputerStorage.cs

@@ -0,0 +1,110 @@
+using Microsoft.EntityFrameworkCore;
+using ComputersShopContracts.BindingModels;
+using ComputersShopContracts.SearchModels;
+using ComputersShopContracts.StoragesContracts;
+using ComputersShopContracts.ViewModels;
+using ComputersShopDataBaseImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputersShopDataBaseImplement.Implements
+{
+    public class ComputerStorage : IComputerStorage
+    {
+        public List<ComputerViewModel> GetFullList()
+        {
+            using var context = new ComputersShopDataBase();
+            return context.Computers.Include(x => x.Components)
+            .ThenInclude(x => x.Component)
+            .ToList()
+            .Select(x => x.GetViewModel)
+            .ToList();
+        }
+        public List<ComputerViewModel> GetFilteredList(ComputerSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComputerName))
+            {
+                return new();
+            }
+            using var context = new ComputersShopDataBase();
+            return context.Computers
+             .Include(x => x.Components)
+            .ThenInclude(x => x.Component)
+            .Where(x => x.ComputerName.Contains(model.ComputerName))
+            .ToList()
+            .Select(x => x.GetViewModel)
+            .ToList();
+        }
+        public ComputerViewModel? GetElement(ComputerSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComputerName) &&
+            !model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputersShopDataBase();
+            return context.Computers
+             .Include(x => x.Components)
+             .ThenInclude(x => x.Component)
+             .FirstOrDefault(x => (!string.IsNullOrEmpty(model.ComputerName) &&
+            x.ComputerName == model.ComputerName) ||
+            (model.Id.HasValue && x.Id ==
+            model.Id))
+            ?.GetViewModel;
+        }
+        public ComputerViewModel? Insert(ComputerBindingModel model)
+        {
+            using var context = new ComputersShopDataBase();
+            var newProduct = Computer.Create(context, model);
+            if (newProduct == null)
+            {
+                return null;
+            }
+            context.Computers.Add(newProduct);
+            context.SaveChanges();
+            return newProduct.GetViewModel;
+        }
+        public ComputerViewModel? Update(ComputerBindingModel model)
+        {
+            using var context = new ComputersShopDataBase();
+            using var transaction = context.Database.BeginTransaction();
+            try
+            {
+                var product = context.Computers.FirstOrDefault(rec =>
+                rec.Id == model.Id);
+                if (product == null)
+                {
+                    return null;
+                }
+                product.Update(model);
+                context.SaveChanges();
+                product.UpdateComponents(context, model);
+                transaction.Commit();
+                return product.GetViewModel;
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+        public ComputerViewModel? Delete(ComputerBindingModel model)
+        {
+            using var context = new ComputersShopDataBase();
+            var element = context.Computers
+            .Include(x => x.Components)
+            .FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                context.Computers.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+    }
+}

ComputersShop/ComputersShopDataBaseImplement/Implements/OrderStorage.cs

@@ -0,0 +1,106 @@
+using ComputersShopContracts.BindingModels;
+using ComputersShopContracts.SearchModels;
+using ComputersShopContracts.StoragesContracts;
+using ComputersShopContracts.ViewModels;
+using ComputersShopDataBaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputersShopDataBaseImplement.Implements
+{
+    public class OrderStorage : IOrderStorage
+    {
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            using var context = new ComputersShopDataBase();
+
+            var element = context.Orders.FirstOrDefault(rec => rec.Id == model.Id);
+
+            if (element != null)
+            {
+                context.Orders.Remove(element);
+                context.SaveChanges();
+
+                return GetViewModel(element);
+            }
+
+            return null;
+        }
+
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+
+            using var context = new ComputersShopDataBase();
+
+            return GetViewModel(context.Orders.FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id)));
+        }
+
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return new();
+            }
+
+            using var context = new ComputersShopDataBase();
+
+            return context.Orders.Where(x => x.Id == model.Id).Select(x => GetViewModel(x)).ToList();
+        }
+
+        public List<OrderViewModel> GetFullList()
+        {
+            using var context = new ComputersShopDataBase();
+
+            return context.Orders.Select(x => GetViewModel(x)).ToList();
+        }
+
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            var newOrder = Order.Create(model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+
+            using var context = new ComputersShopDataBase();
+
+            context.Orders.Add(newOrder);
+            context.SaveChanges();
+            return GetViewModel(newOrder);
+        }
+
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            using var context = new ComputersShopDataBase();
+
+            var order = context.Orders.FirstOrDefault(x => x.Id == model.Id);
+
+            if (order == null)
+            {
+                return null;
+            }
+
+            order.Update(model);
+            context.SaveChanges();
+
+            return GetViewModel(order);
+        }
+
+        private static OrderViewModel GetViewModel(Order order)
+        {
+            var viewModel = order.GetViewModel;
+            using var context = new ComputersShopDataBase();
+            var element = context.Computers.FirstOrDefault(x => x.Id == order.ComputerId);
+            viewModel.ComputerName = element.ComputerName;
+            return viewModel;
+        }
+    }
+}

ComputersShop/ComputersShopDataBaseImplement/Migrations/20240304180911_InitialCreate.Designer.cs

@@ -0,0 +1,169 @@
+// <auto-generated />
+using System;
+using ComputersShopDataBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ComputersShopDataBaseImplement.Migrations
+{
+    [DbContext(typeof(ComputersShopDataBase))]
+    [Migration("20240304180911_InitialCreate")]
+    partial class InitialCreate
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.3")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Component", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ComponentName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Cost")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Components");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Computer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ComputerName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Computers");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.ComputerComponent", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ComponentId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ComputerId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ComponentId");
+
+                    b.HasIndex("ComputerId");
+
+                    b.ToTable("ComputerComponents");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Order", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ComputerId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("DateCreate")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime?>("DateImplement")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ComputerId");
+
+                    b.ToTable("Orders");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.ComputerComponent", b =>
+                {
+                    b.HasOne("ComputersShopDataBaseImplement.Models.Component", "Component")
+                        .WithMany("ComputerComponents")
+                        .HasForeignKey("ComponentId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ComputersShopDataBaseImplement.Models.Computer", "Computer")
+                        .WithMany("Components")
+                        .HasForeignKey("ComputerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Component");
+
+                    b.Navigation("Computer");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Order", b =>
+                {
+                    b.HasOne("ComputersShopDataBaseImplement.Models.Computer", null)
+                        .WithMany("Orders")
+                        .HasForeignKey("ComputerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Component", b =>
+                {
+                    b.Navigation("ComputerComponents");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Computer", b =>
+                {
+                    b.Navigation("Components");
+
+                    b.Navigation("Orders");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

ComputersShop/ComputersShopDataBaseImplement/Migrations/20240304180911_InitialCreate.cs

@@ -0,0 +1,126 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ComputersShopDataBaseImplement.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitialCreate : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Components",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    ComponentName = table.Column<string>(type: "text", nullable: false),
+                    Cost = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Components", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Computers",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    ComputerName = table.Column<string>(type: "text", nullable: false),
+                    Price = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Computers", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ComputerComponents",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    ComputerId = table.Column<int>(type: "integer", nullable: false),
+                    ComponentId = table.Column<int>(type: "integer", nullable: false),
+                    Count = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ComputerComponents", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_ComputerComponents_Components_ComponentId",
+                        column: x => x.ComponentId,
+                        principalTable: "Components",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_ComputerComponents_Computers_ComputerId",
+                        column: x => x.ComputerId,
+                        principalTable: "Computers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Orders",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    ComputerId = table.Column<int>(type: "integer", nullable: false),
+                    Count = table.Column<int>(type: "integer", nullable: false),
+                    Sum = table.Column<double>(type: "double precision", nullable: false),
+                    Status = table.Column<int>(type: "integer", nullable: false),
+                    DateCreate = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    DateImplement = table.Column<DateTime>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Orders", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Orders_Computers_ComputerId",
+                        column: x => x.ComputerId,
+                        principalTable: "Computers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ComputerComponents_ComponentId",
+                table: "ComputerComponents",
+                column: "ComponentId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ComputerComponents_ComputerId",
+                table: "ComputerComponents",
+                column: "ComputerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Orders_ComputerId",
+                table: "Orders",
+                column: "ComputerId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ComputerComponents");
+
+            migrationBuilder.DropTable(
+                name: "Orders");
+
+            migrationBuilder.DropTable(
+                name: "Components");
+
+            migrationBuilder.DropTable(
+                name: "Computers");
+        }
+    }
+}

ComputersShop/ComputersShopDataBaseImplement/Migrations/ComputersShopDataBaseModelSnapshot.cs

@@ -0,0 +1,166 @@
+// <auto-generated />
+using System;
+using ComputersShopDataBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace ComputersShopDataBaseImplement.Migrations
+{
+    [DbContext(typeof(ComputersShopDataBase))]
+    partial class ComputersShopDataBaseModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.3")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Component", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ComponentName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Cost")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Components");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Computer", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ComputerName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Computers");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.ComputerComponent", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ComponentId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ComputerId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ComponentId");
+
+                    b.HasIndex("ComputerId");
+
+                    b.ToTable("ComputerComponents");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Order", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ComputerId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("DateCreate")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime?>("DateImplement")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ComputerId");
+
+                    b.ToTable("Orders");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.ComputerComponent", b =>
+                {
+                    b.HasOne("ComputersShopDataBaseImplement.Models.Component", "Component")
+                        .WithMany("ComputerComponents")
+                        .HasForeignKey("ComponentId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("ComputersShopDataBaseImplement.Models.Computer", "Computer")
+                        .WithMany("Components")
+                        .HasForeignKey("ComputerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Component");
+
+                    b.Navigation("Computer");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Order", b =>
+                {
+                    b.HasOne("ComputersShopDataBaseImplement.Models.Computer", null)
+                        .WithMany("Orders")
+                        .HasForeignKey("ComputerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Component", b =>
+                {
+                    b.Navigation("ComputerComponents");
+                });
+
+            modelBuilder.Entity("ComputersShopDataBaseImplement.Models.Computer", b =>
+                {
+                    b.Navigation("Components");
+
+                    b.Navigation("Orders");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

ComputersShop/ComputersShopDataBaseImplement/Models/Component.cs

@@ -0,0 +1,64 @@
+using ComputersShopDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ComputersShopContracts.BindingModels;
+using ComputersShopContracts.ViewModels;
+
+namespace ComputersShopDataBaseImplement.Models
+{
+    public class Component : IComponentModel
+    {
+        public int Id { get; private set; }
+        [Required]
+        public string ComponentName { get; private set; } = string.Empty;
+        [Required]
+        public double Cost { get; set; }
+        [ForeignKey("ComponentId")]
+        public virtual List<ComputerComponent> ComputerComponents { get; set; } = new();
+        public static Component? Create(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+        public static Component Create(ComponentViewModel model)
+        {
+            return new Component
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+        public void Update(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ComponentName = model.ComponentName;
+            Cost = model.Cost;
+        }
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComponentName = ComponentName,
+            Cost = Cost
+        };
+    }
+
+}
+

ComputersShop/ComputersShopDataBaseImplement/Models/Computer.cs

@@ -0,0 +1,98 @@
+using ComputersShopDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ComputersShopContracts.BindingModels;
+using ComputersShopContracts.ViewModels;
+
+namespace ComputersShopDataBaseImplement.Models
+{
+    public class Computer : IComputerModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public string ComputerName { get; set; } = string.Empty;
+        [Required]
+        public double Price { get; set; }
+        private Dictionary<int, (IComponentModel, int)>? _ComputerComponents = null;
+        [NotMapped]
+        public Dictionary<int, (IComponentModel, int)> ComputerComponents
+        {
+            get
+            {
+                if (_ComputerComponents == null)
+                {
+                    _ComputerComponents = Components.ToDictionary(recPC => recPC.ComponentId, recPC =>
+                   (recPC.Component as IComponentModel, recPC.Count));
+                }
+                return _ComputerComponents;
+            }
+        }
+        [ForeignKey("ComputerId")]
+        public virtual List<ComputerComponent> Components { get; set; } = new();
+        [ForeignKey("ComputerId")]
+        public virtual List<Order> Orders { get; set; } = new();
+        public static Computer Create(ComputersShopDataBase context, ComputerBindingModel model)
+        {
+            return new Computer()
+            {
+                Id = model.Id,
+                ComputerName = model.ComputerName,
+                Price = model.Price,
+                Components = model.ComputerComponents.Select(x => new ComputerComponent
+                {
+                    Component = context.Components.First(y => y.Id == x.Key),
+                    Count = x.Value.Item2
+                }).ToList()
+            };
+        }
+        public void Update(ComputerBindingModel model)
+        {
+            ComputerName = model.ComputerName;
+            Price = model.Price;
+        }
+        public ComputerViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComputerName = ComputerName,
+            Price = Price,
+            ComputerComponents = ComputerComponents
+        };
+        public void UpdateComponents(ComputersShopDataBase context,
+        ComputerBindingModel model)
+        {
+            var ComputerComponents = context.ComputerComponents.Where(rec =>
+           rec.ComputerId == model.Id).ToList();
+            if (ComputerComponents != null && ComputerComponents.Count > 0)
+            { // удалили те, которых нет в модели
+                context.ComputerComponents.RemoveRange(ComputerComponents.Where(rec
+               => !model.ComputerComponents.ContainsKey(rec.ComponentId)));
+                context.SaveChanges();
+                // обновили количество у существующих записей
+                foreach (var updateComponent in ComputerComponents)
+                {
+                    updateComponent.Count = model.ComputerComponents[updateComponent.ComponentId].Item2;
+                    model.ComputerComponents.Remove(updateComponent.ComponentId);
+                }
+                context.SaveChanges();
+            }
+            var Computer = context.Computers.First(x => x.Id == Id);
+            foreach (var pc in model.ComputerComponents)
+            {
+                context.ComputerComponents.Add(new ComputerComponent
+                {
+                    Computer = Computer,
+                    Component = context.Components.First(x => x.Id == pc.Key),
+                    Count = pc.Value.Item2
+                });
+                context.SaveChanges();
+            }
+            _ComputerComponents = null;
+        }
+    }
+}
+

ComputersShop/ComputersShopDataBaseImplement/Models/ComputerComponent.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputersShopDataBaseImplement.Models
+{
+    public class ComputerComponent
+    {
+        public int Id { get; set; }
+        [Required]
+        public int ComputerId { get; set; }
+        [Required]
+        public int ComponentId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        public virtual Component Component { get; set; } = new();
+        public virtual Computer Computer { get; set; } = new();
+    }
+}

ComputersShop/ComputersShopDataBaseImplement/Models/Order.cs

@@ -0,0 +1,70 @@
+using ComputersShopContracts.BindingModels;
+using ComputersShopContracts.ViewModels;
+using ComputersShopDataModels.Enums;
+using ComputersShopDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputersShopDataBaseImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        [Required]
+        public int ComputerId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        [Required]
+        public double Sum { get; set; }
+        [Required]
+        public OrderStatus Status { get; set; }
+        [Required]
+        public DateTime DateCreate { get; set; }
+
+        public DateTime? DateImplement { get; set; }
+
+        public int Id { get; set; }
+
+        public static Order? Create(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                ComputerId = model.ComputerId,
+                Count = model.Count,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement
+            };
+        }
+
+        public void Update(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Status = model.Status;
+            DateImplement = model.DateImplement;
+        }
+
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComputerId = ComputerId,
+            Count = Count,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement
+        };
+    }
+}

ComputersShop/ComputersShopFileImplement/Implements/OrderStorage.cs

@@ -82,11 +82,14 @@ namespace ComputersShopFileImplement.Implements
         private OrderViewModel GetViewModel(Order order)
         {
             var viewModel = order.GetViewModel;
-            var comp = source.Computers.FirstOrDefault(comp => comp.Id == order.ComputerId);
+            foreach (var comp in source.Computers)
-                if (comp != null)
+            {
+                if (comp.Id == order.ComputerId)
                 {
                     viewModel.ComputerName = comp.ComputerName;
+                    break;
                 }
+            }
             return viewModel;
         }
     }

ComputersShop/ComputersShopView/ComputersShopView.csproj

@@ -9,6 +9,10 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.0" />
@@ -19,6 +23,7 @@
   <ItemGroup>
     <ProjectReference Include="..\ComputersShopBusinessLogic\ComputersShopBusinessLogic.csproj" />
     <ProjectReference Include="..\ComputersShopContracts\ComputersShopContracts.csproj" />
+    <ProjectReference Include="..\ComputersShopDataBaseImplement\ComputersShopDataBaseImplement.csproj" />
     <ProjectReference Include="..\ComputersShopFileImplement\ComputersShopFileImplement.csproj" />
   </ItemGroup>
 

ComputersShop/ComputersShopView/Program.cs

@@ -1,7 +1,7 @@
 using ComputersShopBusinessLogic.BusinessLogics;
 using ComputersShopContracts.BusinessLogicContracts;
 using ComputersShopContracts.StoragesContracts;
-using ComputersShopFileImplement.Implements;
+using ComputersShopDataBaseImplement.Implements;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using NLog.Extensions.Logging;