Merge pull request 'BACKDEV-408' (#8) from BACKDEV-408 into dev

Reviewed-on: #8

ComputerHardwareStore/ComputerHardwareStore.sln

@@ -9,7 +9,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerHardwareStoreDataMo
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerHardwareStoreContracts", "ComputerHardwareStoreContracts\ComputerHardwareStoreContracts.csproj", "{5F394E21-2597-432B-AE73-BBAFD8D9F50E}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ComputerHardwareStoreBusinessLogic", "ComputerHardwareStoreBusinessLogic\ComputerHardwareStoreBusinessLogic.csproj", "{D32DEB60-AF40-46AF-8914-DC6A19BD66CD}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerHardwareStoreBusinessLogic", "ComputerHardwareStoreBusinessLogic\ComputerHardwareStoreBusinessLogic.csproj", "{D32DEB60-AF40-46AF-8914-DC6A19BD66CD}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComputerHardwareStoreDatabaseImplement", "ComputerHardwareStoreDatabaseImplement\ComputerHardwareStoreDatabaseImplement.csproj", "{93BD4E28-48D8-4D3A-87FB-FB96F00DA64B}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

ComputerHardwareStore/ComputerHardwareStoreBusinessLogic/ComputerHardwareStoreBusinessLogic.csproj

@@ -6,6 +6,12 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Compile Remove="BusinessLogic\**" />
+    <EmbeddedResource Remove="BusinessLogic\**" />
+    <None Remove="BusinessLogic\**" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.1" />
   </ItemGroup>

ComputerHardwareStore/ComputerHardwareStoreContracts/BindingModels/BuildBindingModel.cs

@@ -7,7 +7,8 @@ namespace ComputerHardwareStoreContracts.BindingModels
         public int Id { get; set; }
         public string Name { get; set; } = string.Empty;
         public double Price { get; set; }
-        public int VendorId { get; set; }
+        public IVendorModel Vendor { get; set; }
         public Dictionary<int, (IComponentModel, int)> BuildComponents { get; set; } = new();
+        public List<ICommentModel> Comments { get; set; } = new();
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/BindingModels/ComponentBindingModel.cs

@@ -7,6 +7,6 @@ namespace ComputerHardwareStoreContracts.BindingModels
         public int Id { get; set; }
         public string Name { get; set; } = string.Empty;
         public double Cost { get; set; }
-        public int StoreKeeperId { get; set; }
+        public IStoreKeeperModel StoreKeeper { get; set; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/BindingModels/OrderBindingModel.cs

@@ -10,6 +10,6 @@ namespace ComputerHardwareStoreContracts.BindingModels
         public OrderStatus Status { get; set; } = OrderStatus.Неизвестен;
         public DateTime DateCreate { get; set; } = DateTime.Now;
         public DateTime? DateImplement { get; set; } = null;
-        public Dictionary<int, (IProductModel, int)> OrderProduct { get; set; } = new();
+        public Dictionary<int, (IProductModel, int)> OrderProducts { get; set; } = new();
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/BindingModels/PurchaseBindingModel.cs

@@ -8,7 +8,8 @@ namespace ComputerHardwareStoreContracts.BindingModels
         public int VendorId { get; set; }
         public double Cost { get; set; }
         public DateTime DateCreate { get; set; }
-        public Dictionary<int, (IBuildModel, int)> PurchaseBuild { get; set; } = new();
-        public Dictionary<int, (IProductModel, int)> PurchaseProduct { get; set; } = new();
+        public DateTime? DateImplement { get; set; }
+        public Dictionary<int, (IBuildModel, int)> PurchaseBuilds { get; set; } = new();
+        public Dictionary<int, (IProductModel, int)> PurchaseProducts { get; set; } = new();
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/SearchModels/BuildSearchModel.cs

@@ -3,7 +3,7 @@
     public class BuildSearchModel
     {
         public int? Id { get; set; }
+        public int VendorId { get; set; }
         public string? Name { get; set; }
-        public int? VendorId { get; set; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/SearchModels/CommentSearchModel.cs

@@ -3,6 +3,5 @@
     public class CommentSearchModel
     {
         public int? Id { get; set; }
-        public DateTime? Date { get; set; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/SearchModels/ProductSearchModel.cs

@@ -4,6 +4,7 @@
     {
         public int? Id { get; set; }
         public string? Name { get; set; }
-        public int? StoreKeeperId { get; set; }
+        public int VendorId { get; set; }
+        public List<int>? Builds { get; set; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/SearchModels/StoreKeeperSearchModel.cs

@@ -4,6 +4,5 @@
     {
         public int? Id { get; set; }
         public string? Login { get; set; }
-        public string? Password { get; set; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/ViewModels/BuildViewModel.cs

@@ -7,10 +7,11 @@ namespace ComputerHardwareStoreContracts.ViewModels
     {
         public int Id { get; set; }
         [DisplayName("Название сборки")]
-        public string Name { get; } = string.Empty;
+        public string Name { get; set; } = string.Empty;
         [DisplayName("Стоимость")]
-        public double Price { get; }
-        public int VendorId { get; }
-        public Dictionary<int, (IComponentModel, int)> BuildComponents { get; } = new();
+        public double Price { get; set; }
+        public IVendorModel Vendor { get; set; }
+        public Dictionary<int, (IComponentModel, int)> BuildComponents { get; set; } = new();
+        public List<ICommentModel> Comments { get; set; } = new();
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/ViewModels/CommentViewModel.cs

@@ -7,6 +7,5 @@ namespace ComputerHardwareStoreContracts.ViewModels
         public int Id { get; set; }
         public DateTime Date { get; set; }
         public string Text { get; set; } = string.Empty;
-        public int BuildId { get; set; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/ViewModels/ComponentViewModel.cs

@@ -10,6 +10,6 @@ namespace ComputerHardwareStoreContracts.ViewModels
         public string Name { get; set; } = string.Empty;
         [DisplayName("Цена")]
         public double Cost { get; set; }
-        public int StoreKeeperId { get; set; }
+        public IStoreKeeperModel StoreKeeper { get; set; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/ViewModels/OrderViewModel.cs

@@ -16,6 +16,6 @@ namespace ComputerHardwareStoreContracts.ViewModels
         public DateTime DateCreate { get; set; }
         [DisplayName("Дата выполнения")]
         public DateTime? DateImplement { get; set; }
-        public Dictionary<int, (IProductModel, int)> OrderProduct { get; set; } = new();
+        public Dictionary<int, (IProductModel, int)> OrderProducts { get; set; } = new();
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/ViewModels/ProductViewModel.cs

@@ -10,8 +10,6 @@ namespace ComputerHardwareStoreContracts.ViewModels
         public string Name { get; set; } = string.Empty;
         [DisplayName("Цена")]
         public double Price { get; set; }
-        public Dictionary<int, (IComponentModel, int)> CannedComponents { get; set; } = new();
-
-        public Dictionary<int, (IComponentModel, int)> ProductComponents => throw new NotImplementedException();
+        public Dictionary<int, (IComponentModel, int)> ProductComponents { get; set; } = new();
     }
 }

ComputerHardwareStore/ComputerHardwareStoreContracts/ViewModels/PurchaseViewModel.cs

@@ -10,11 +10,12 @@ namespace ComputerHardwareStoreContracts.ViewModels
         public double Cost { get; set; }
         [DisplayName("Дата создания")]
         public DateTime DateCreate { get; set; }
+        public DateTime? DateImplement { get; set; }
         public int VendorId { get; set; }
         [DisplayName("Сумма")]
         public double Sum { get; set; }
-        public Dictionary<int, (IBuildModel, int)> PurchaseBuild { get; set; } = new();
+        public Dictionary<int, (IBuildModel, int)> PurchaseBuilds { get; set; } = new();
 
-        public Dictionary<int, (IProductModel, int)> PurchaseProduct { get; set; } = new();
+        public Dictionary<int, (IProductModel, int)> PurchaseProducts { get; set; } = new(); 
     }
 }

ComputerHardwareStore/ComputerHardwareStoreDataModels/Models/IBuildModel.cs

@@ -4,7 +4,8 @@
     {
         string Name { get; }
         double Price { get; }
-        int VendorId { get; }
+        IVendorModel Vendor { get; }
         public Dictionary<int, (IComponentModel, int)> BuildComponents { get; }
+        public List<ICommentModel> Comments { get; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreDataModels/Models/ICommentModel.cs

@@ -4,6 +4,5 @@
     {
         DateTime Date { get; }
         string Text { get; }
-        int BuildId { get; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreDataModels/Models/IComponentModel.cs

@@ -4,6 +4,6 @@
     {
         string Name { get; }
         double Cost { get; }
-        int StoreKeeperId { get; }
+        IStoreKeeperModel StoreKeeper { get; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreDataModels/Models/IOrderModel.cs

@@ -8,6 +8,6 @@ namespace ComputerHardwareStoreDataModels.Models
         OrderStatus Status { get; }
         DateTime DateCreate { get; }
         DateTime? DateImplement { get; }
-        public Dictionary<int, (IProductModel, int)> OrderProduct { get; }
+        public Dictionary<int, (IProductModel, int)> OrderProducts { get; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreDataModels/Models/IPurchaseModel.cs

@@ -5,7 +5,8 @@
         int VendorId { get; }
         double Cost { get; }
         DateTime DateCreate { get; }
-        public Dictionary<int, (IBuildModel, int)> PurchaseBuild { get; }
-        public Dictionary<int, (IProductModel, int)> PurchaseProduct { get; }
+        DateTime? DateImplement { get; }
+        public Dictionary<int, (IBuildModel, int)> PurchaseBuilds { get; }
+        public Dictionary<int, (IProductModel, int)> PurchaseProducts { get; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/ComputerHardwareStoreDBContext.cs

@@ -0,0 +1,44 @@
+using ComputerHardwareStoreDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace ComputerHardwareStoreDatabaseImplement
+{
+    public class ComputerHardwareStoreDBContext : DbContext
+    {
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            /*
+                * в program добавить:
+                * // получаем строку подключения из файла конфигурации
+                * string connection = builder.Configuration.GetConnectionString("DefaultConnection");
+                * 
+                * // добавляем контекст ApplicationContext в качестве сервиса в приложение
+                * builder.Services.AddDbContext<ApplicationContext>(options => options.UseSqlServer(connection));
+                * 
+                * в appsettings:
+                * "ConnectionStrings": {
+                *      "DefaultConnection": "Host=localhost;Database=ProductBar_db;Username=compstore;Password=compstore"
+                * },
+            */
+
+            base.OnConfiguring(optionsBuilder);
+            AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
+            AppContext.SetSwitch("Npgsql.DisableDateTimeInfinityConversions", true);
+        }
+        public virtual DbSet<Component> Components { set; get; }
+        public virtual DbSet<Product> Products { set; get; }
+        public virtual DbSet<ProductComponent> ProductComponents { set; get; }
+
+        public virtual DbSet<StoreKeeper> StoreKeepers { set; get; }
+        public virtual DbSet<Build> Builds { set; get; }
+        public virtual DbSet<Order> Orders { set; get; }
+        public virtual DbSet<OrderProduct> OrderProducts { set; get; }
+        public virtual DbSet<BuildComponent> BuildComponents { set; get; }
+        public virtual DbSet<Comment> Comments { set; get; }
+        public virtual DbSet<Vendor> Vendors { set; get; }
+        public virtual DbSet<Purchase> Purchases { set; get; }
+        public virtual DbSet<PurchaseBuild> PurchaseBuilds { set; get; }
+        public virtual DbSet<PurchaseProduct> PurchaseProducts { set; get; }
+        public virtual DbSet<Vendor> Vendors { set; get; }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/ComputerHardwareStoreDatabaseImplement.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.4" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ComputerHardwareStoreContracts\ComputerHardwareStoreContracts.csproj" />
+    <ProjectReference Include="..\ComputerHardwareStoreDataModels\ComputerHardwareStoreDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Implements/BuildStorage.cs

@@ -0,0 +1,117 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.SearchModels;
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace ComputerHardwareStoreDatabaseImplement.Implements
+{
+    public class BuildStorage : IBuildStorage
+    {
+        public List<BuildViewModel> GetFullList()
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Builds
+                .Include(b => b.Comments)
+                .Include(b => b.Components)
+                .ThenInclude(b => b.Component)
+                .Include(b => b.Vendor)
+                .Select(b => b.GetViewModel)
+                .ToList();
+        }
+
+        public List<BuildViewModel> GetFilteredList(BuildSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                return new();
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Builds
+                .Include(b => b.Vendor)
+                .Where(b => b.Vendor.Id == model.VendorId )
+                .Where(b => b.Name.Contains(model.Name))
+                .Include(b => b.Comments)
+                .Include(b => b.Components)
+                .ThenInclude(b => b.Component)
+                .Select(b => b.GetViewModel)
+                .ToList();
+        }
+
+        public BuildViewModel? GetElement(BuildSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Builds
+                .Include(b => b.Vendor)
+                .Where(b => b.Vendor.Id == model.VendorId)
+                .Include(b => b.Comments)
+                .Include(b => b.Components)
+                .ThenInclude(b => b.Component)
+                .FirstOrDefault(b =>
+                (!string.IsNullOrEmpty(model.Name) && b.Name == model.Name) ||
+                (model.Id.HasValue && b.Id == model.Id))?
+                .GetViewModel;
+        }        
+
+        public BuildViewModel? Insert(BuildBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var newBuild = Build.Create(context, model);
+            if (newBuild == null)
+            {
+                return null;
+            }
+            context.Builds.Add(newBuild);
+            context.SaveChanges();
+            return context.Builds
+                .Include(b => b.Vendor)
+                .Include(b => b.Comments)
+                .Include(b => b.Components)
+                .ThenInclude(b => b.Component)
+                .FirstOrDefault(p => p.Id == newBuild.Id)?
+                .GetViewModel;
+        }
+
+        public BuildViewModel? Update(BuildBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var build = context.Builds
+                .Include(b => b.Comments)
+                .Include(b => b.Components)
+                .ThenInclude(b => b.Component)
+                .Include(b => b.Vendor)
+                .Where(b => b.Vendor.Id == model.Vendor.Id)
+                .FirstOrDefault(p => p.Id == model.Id);
+            if (build == null)
+            {
+                return null;
+            }
+            context.Update(model);
+            context.SaveChanges();
+            return build.GetViewModel;
+        }
+        public BuildViewModel? Delete(BuildBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var build = context.Builds
+                .Include(b => b.Comments)
+                .Include(b => b.Components)
+                .ThenInclude(b => b.Component)
+                .Include(b => b.Vendor)
+                .Where(b => b.Vendor.Id == model.Vendor.Id)
+                .FirstOrDefault(p => p.Id == model.Id);
+            if (build == null)
+            {
+                return null;
+            }
+            context.Builds.Remove(build);
+            context.SaveChanges();
+            return build.GetViewModel;
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Implements/CommentStorage.cs

@@ -0,0 +1,77 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.SearchModels;
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDatabaseImplement.Models;
+
+namespace ComputerHardwareStoreDatabaseImplement.Implements
+{
+    public class CommentStorage : ICommentStorage
+    {
+        public List<CommentViewModel> GetFullList()
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Comments
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<CommentViewModel> GetFilteredList(CommentSearchModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Comments
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public CommentViewModel? GetElement(CommentSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Comments
+                .FirstOrDefault(x => x.Id == model.Id)
+                ?.GetViewModel;
+        }
+
+        public CommentViewModel? Insert(CommentBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var newComment = Comment.Create(model);
+            if (newComment == null)
+            {
+                return null;
+            }
+            context.Comments.Add(newComment);
+            context.SaveChanges();
+            return newComment.GetViewModel;
+        }
+        public CommentViewModel? Update(CommentBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.Comments.FirstOrDefault(x => x.Id == model.Id);
+            if (element == null)
+            {
+                return null;
+            }
+            element.Update(model);
+            context.SaveChanges();
+            return element.GetViewModel;
+        }
+
+        public CommentViewModel? Delete(CommentBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.Comments.FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                context.Comments.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Implements/ComponentStorage.cs

@@ -0,0 +1,84 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.SearchModels;
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDatabaseImplement.Models;
+
+namespace ComputerHardwareStoreDatabaseImplement.Implements
+{
+    public class ComponentStorage : IComponentStorage
+    {
+        public List<ComponentViewModel> GetFullList()
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Components
+                .Select(c => c.GetViewModel)
+                .ToList();
+        }
+
+        public List<ComponentViewModel> GetFilteredList(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                return new();
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Components
+                .Where(c => c.Name.Contains(model.Name))
+                .Select(c => c.GetViewModel)
+                .ToList();
+        }
+
+        public ComponentViewModel? GetElement(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Components
+                .FirstOrDefault(c =>
+                (!string.IsNullOrEmpty(model.Name) && c .Name == model.Name) ||
+                (model.Id.HasValue && c.Id == model.Id))
+                ?.GetViewModel;
+        }
+
+        public ComponentViewModel? Insert(ComponentBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var newComponent = Component.Create(context, model);
+            if (newComponent == null)
+            {
+                return null;
+            }
+            context.Components.Add(newComponent);
+            context.SaveChanges();
+            return newComponent.GetViewModel;
+        }
+        public ComponentViewModel? Update(ComponentBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.Components.FirstOrDefault(x => x.Id == model.Id);
+            if (element == null)
+            {
+                return null;
+            }
+            element.Update(model);
+            context.SaveChanges();
+            return element.GetViewModel;
+        }
+
+        public ComponentViewModel? Delete(ComponentBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.Components.FirstOrDefault(c => c.Id == model.Id);
+            if (element == null)
+            {
+                return null;
+            }
+            context.Components.Remove(element);
+            context.SaveChanges();
+            return element.GetViewModel;
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Implements/OrderStorage.cs

@@ -0,0 +1,108 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.SearchModels;
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace ComputerHardwareStoreDatabaseImplement.Implements
+{
+    public class OrderStorage : IOrderStorage
+    {
+        public List<OrderViewModel> GetFullList()
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Orders
+                .Include(o => o.Products)
+                .ThenInclude(o => o.Product)
+                .Select(o => o.GetViewModel)
+                .ToList();
+        }
+
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Orders 
+                .Include(o => o.Products)
+                .ThenInclude(o => o.Product)
+                .Where(o => 
+                (model.Id.HasValue && o.Id == model.Id) ||
+                ((model.DateFrom.HasValue && model.DateTo.HasValue) && 
+                ((model.DateFrom <= o.DateCreate && o.DateCreate <= model.DateTo) ||
+                (o.DateImplement.HasValue && o.DateCreate < model.DateFrom && model.DateFrom < o.DateImplement)))
+                )
+                .Select(o => o.GetViewModel)
+                .ToList();
+        }
+
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Orders
+                .Include(o => o.Products)
+                .ThenInclude(o => o.Product)
+                .FirstOrDefault(o => o.Id == model.Id)?
+                .GetViewModel;
+
+        }
+
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var newOrder = Order.Create(context, model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+            context.Orders.Add(newOrder);
+            context.SaveChanges();
+            return newOrder.GetViewModel;
+        }
+
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            using var transaction = context.Database.BeginTransaction();
+            try
+            {
+                var order = context.Orders
+                    .Include(o => o.Products)
+                    .ThenInclude(o => o.Product)
+                    .FirstOrDefault(o => o.Id == model.Id);
+                if (order == null)
+                {
+                    return null;
+                }
+                order.Update(model);
+                context.SaveChanges();
+                transaction.Commit();
+                return order.GetViewModel;
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.Orders
+                .Include(o => o.Products)
+                .ThenInclude(o => o.Product)
+                .FirstOrDefault(o => o.Id == model.Id);
+            if (element != null)
+            {
+                context.Orders.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Implements/ProductStorage.cs

@@ -0,0 +1,102 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.SearchModels;
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace ComputerHardwareStoreDatabaseImplement.Implements
+{
+    public class ProductStorage : IProductStorage
+    {
+        public List<ProductViewModel> GetFullList()
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Products
+                .Include(p => p.Components)
+                .ThenInclude(p => p.Component)
+                .Select(p => p.GetViewModel)
+                .ToList();
+        }
+
+        public List<ProductViewModel> GetFilteredList(ProductSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name)) 
+            {
+                return new();
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Products
+                .Where(p => p.Name.Contains(model.Name))
+                .Include(p => p.Components)
+                .ThenInclude(p => p.Component)
+                .Select(p => p.GetViewModel)
+                .ToList();
+        }
+
+        public ProductViewModel? GetElement(ProductSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name) && !model.Id.HasValue) 
+            {
+                return null;
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Products
+                .Include(p => p.Components)
+                .ThenInclude(p => p.Component)
+                .FirstOrDefault(p =>
+                (!string.IsNullOrEmpty(model.Name) && p.Name == model.Name) ||
+                (model.Id.HasValue && p.Id == model.Id))?
+                .GetViewModel;
+        }
+
+        public ProductViewModel? Insert(ProductBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var newProduct = Product.Create(context, model);
+            if (newProduct == null)
+            {
+                return null;
+            }
+            context.Products.Add(newProduct);
+            context.SaveChanges();
+            return context.Products
+                .Include(p => p.Components)
+                .ThenInclude(p => p.Component)
+                .FirstOrDefault(p => p.Id == newProduct.Id)?
+                .GetViewModel;
+        }
+
+        public ProductViewModel? Update(ProductBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var product = context.Products
+                .Include(p => p.Components)
+                .ThenInclude(p => p.Component)
+                .FirstOrDefault(p => p.Id == model.Id);
+            if (product == null)
+            {
+                return null; 
+            }
+            context.Update(model);
+            context.SaveChanges();
+            return product.GetViewModel;
+        }
+
+        public ProductViewModel? Delete(ProductBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var product = context.Products
+                .Include(p => p.Components)
+                .ThenInclude(p => p.Component)
+                .FirstOrDefault(p => p.Id == model.Id);
+            if (product == null) 
+            {
+                return null;
+            }
+            context.Products.Remove(product);
+            context.SaveChanges();
+            return product.GetViewModel;
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Implements/PurchaseStorage.cs

@@ -0,0 +1,117 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.SearchModels;
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace ComputerHardwareStoreDatabaseImplement.Implements
+{
+    public class PurchaseStorage : IPurchaseStorage
+    {
+        public List<PurchaseViewModel> GetFullList()
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Purchases
+                .Include(p => p.Builds)
+                .ThenInclude(p => p.Build)
+                .Include(p => p.Products)
+                .ThenInclude(p => p.Product)
+                .Select(p => p.GetViewModel)
+                .ToList();
+        }
+        
+        public List<PurchaseViewModel> GetFilteredList(PurchaseSearchModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Purchases
+                .Include(p => p.Builds)
+                .ThenInclude(p => p.Build)
+                .Include(p => p.Products)
+                .ThenInclude(p => p.Product)
+                .Where(p =>
+                (model.Id.HasValue && p.Id == model.Id) ||
+                ((model.DateFrom.HasValue && model.DateTo.HasValue) &&
+                ((model.DateFrom <= p.DateCreate && p.DateCreate <= model.DateTo) ||
+                (p.DateImplement.HasValue && p.DateCreate < model.DateFrom && model.DateFrom < p.DateImplement)))
+                )
+                .Select(p => p.GetViewModel)
+                .ToList();
+        }
+
+        public PurchaseViewModel? GetElement(PurchaseSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Purchases
+                .Include(p => p.Builds)
+                .ThenInclude(p => p.Build)
+                .Include(p => p.Products)
+                .ThenInclude(p => p.Product)
+                .FirstOrDefault(p => p.Id == model.Id)?
+                .GetViewModel;
+        }
+
+        public PurchaseViewModel? Insert(PurchaseBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var newPurchase = Purchase.Create(context, model);
+            if (newPurchase == null)
+            {
+                return null;
+            }
+            context.Purchases.Add(newPurchase);
+            context.SaveChanges();
+            return newPurchase.GetViewModel;
+        }
+
+        public PurchaseViewModel? Update(PurchaseBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            using var transaction = context.Database.BeginTransaction();
+            try
+            {
+                var purchase = context.Purchases
+                    .Include(p => p.Builds)
+                    .ThenInclude(p => p.Build)
+                    .Include(p => p.Products)
+                    .ThenInclude(p => p.Product)
+                    .FirstOrDefault(p => p.Id == model.Id);
+                if (purchase == null)
+                {
+                    return null;
+                }
+                purchase.Update(model);
+                context.SaveChanges();
+                transaction.Commit();
+                return purchase.GetViewModel;
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+
+        public PurchaseViewModel? Delete(PurchaseBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.Purchases
+                .Include(p => p.Builds)
+                .ThenInclude(p => p.Build)
+                .Include(p => p.Products)
+                .ThenInclude(p => p.Product)
+                .FirstOrDefault(o => o.Id == model.Id);
+            if (element != null)
+            {
+                context.Purchases.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Implements/StoreKeeperStorage.cs

@@ -0,0 +1,86 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.SearchModels;
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace ComputerHardwareStoreDatabaseImplement.Implements
+{
+    public class StoreKeeperStorage : IStoreKeeperStorage
+    {
+        public StoreKeeperViewModel? GetElement(StoreKeeperSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Login) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.StoreKeepers
+                .FirstOrDefault(x => (!string.IsNullOrEmpty(model.Login)
+                && x.Login == model.Login)
+                || (model.Id.HasValue && x.Id == model.Id))
+                ?.GetViewModel;
+        }
+
+        public List<StoreKeeperViewModel> GetFilteredList(StoreKeeperSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Login))
+            {
+                return new();
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.StoreKeepers
+                .Where(x => x.Login.Contains(model.Login))
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<StoreKeeperViewModel> GetFullList()
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.StoreKeepers
+                .Include(x => x.Components)
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public StoreKeeperViewModel? Insert(StoreKeeperBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var newStoreKeeper = StoreKeeper.Create(context, model);
+            if (newStoreKeeper == null)
+            {
+                return null;
+            }
+            context.StoreKeepers.Add(newStoreKeeper);
+            context.SaveChanges();
+            return newStoreKeeper.GetViewModel;
+        }
+
+        public StoreKeeperViewModel? Update(StoreKeeperBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.StoreKeepers.FirstOrDefault(x => x.Id == model.Id);
+            if (element == null)
+            {
+                return null;
+            }
+            element.Update(model);
+            context.SaveChanges();
+            return element.GetViewModel;
+        }
+        public StoreKeeperViewModel? Delete(StoreKeeperBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.StoreKeepers.FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                context.StoreKeepers.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Implements/Vendor.cs

@@ -0,0 +1,84 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.SearchModels;
+using ComputerHardwareStoreContracts.StorageContracts;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDatabaseImplement.Models;
+
+namespace ComputerHardwareStoreDatabaseImplement.Implements
+{
+    public class VendorStorage : IVendorStorage
+    {
+        public VendorViewModel? GetElement(VendorSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Login) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Vendors
+                .FirstOrDefault(x => (!string.IsNullOrEmpty(model.Login)
+                && x.Login == model.Login)
+                || (model.Id.HasValue && x.Id == model.Id))
+                ?.GetViewModel;
+        }
+
+        public List<VendorViewModel> GetFilteredList(VendorSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Login))
+            {
+                return new();
+            }
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Vendors
+                .Where(x => x.Login.Contains(model.Login))
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<VendorViewModel> GetFullList()
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            return context.Vendors
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public VendorViewModel? Insert(VendorBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var newVendor = Vendor.Create(context, model);
+            if (newVendor == null)
+            {
+                return null;
+            }
+            context.Vendors.Add(newVendor);
+            context.SaveChanges();
+            return newVendor.GetViewModel;
+        }
+
+        public VendorViewModel? Update(VendorBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.Vendors.FirstOrDefault(x => x.Id == model.Id);
+            if (element == null)
+            {
+                return null;
+            }
+            element.Update(model);
+            context.SaveChanges();
+            return element.GetViewModel;
+        }
+        public VendorViewModel? Delete(VendorBindingModel model)
+        {
+            using var context = new ComputerHardwareStoreDBContext();
+            var element = context.Vendors.FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                context.Vendors.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Build.cs

@@ -0,0 +1,88 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using Microsoft.EntityFrameworkCore.Metadata.Internal;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Build : IBuildModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public string Name { get; set; } = string.Empty;
+        [Required]
+        public double Price { get; set; }
+        [NotMapped]
+        private Dictionary<int, (IComponentModel, int)>? _buildComponents = null;
+        [NotMapped]
+        public Dictionary<int, (IComponentModel, int)> BuildComponents
+        {
+            get
+            {
+                if (_buildComponents == null)
+                {
+                    _buildComponents = Components
+                        .ToDictionary(bc => bc.ComponentId, bc =>
+                        (bc.Component as IComponentModel, bc.Count));
+                }
+                return _buildComponents;
+            }   
+        }
+        [ForeignKey("BuildId")]
+        public virtual List<BuildComponent> Components { get; set; } = new();
+        [ForeignKey("BuildId")]
+
+        public virtual List<Comment> Comments { get; set; } = new();
+        [NotMapped]
+        List<ICommentModel> IBuildModel.Comments => Comments.Select(c => c as ICommentModel).ToList();
+
+        public virtual Vendor Vendor { get; private set; } = new();
+        IVendorModel IBuildModel.Vendor => Vendor as IVendorModel;
+
+        public static Build? Create(ComputerHardwareStoreDBContext context, BuildBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Price = model.Price,
+                Vendor = context.Vendors.First(v => v.Id == model.Vendor.Id),
+                Components = context.Components
+                    .Where(c => model.BuildComponents.ContainsKey(c.Id))
+                    .Select(c => new BuildComponent()
+                    {
+                        BuildId = model.Id,
+                        ComponentId = c.Id,
+                        Component = c,
+                        Count = model.BuildComponents[c.Id].Item2
+                    }).ToList()
+            };
+        }
+
+        public void Update(BuildBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Name = string.IsNullOrEmpty(model.Name) ? Name : model.Name;
+            Price = model.Price;
+        }
+
+        public BuildViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Price = Price,
+            Vendor = Vendor,
+            Comments = Comments.Select(c => c as ICommentModel).ToList(),
+            BuildComponents = BuildComponents
+        };
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/BuildComponent.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class BuildComponent
+    {
+        public int Id { get; set; }
+        [Required]
+        public int BuildId { get; set; }
+        [Required]
+        public int ComponentId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        public virtual Build Build { get; set; } = new();
+        public virtual Component Component { get; set; } = new();
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Comment.cs

@@ -0,0 +1,48 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Comment : ICommentModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public DateTime Date { get; set; }
+        [Required]
+        public string Text { get; set; } = string.Empty;
+        [Required]
+        public int BuildId { get; set; }
+        public static Comment? Create(CommentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new()
+            {
+                Id = model.Id,
+                Date = model.Date,
+                Text = model.Text,
+                BuildId = model.BuildId,
+            };
+        }
+
+        public void Update(CommentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Text = model.Text;
+        }
+
+        public CommentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Date = Date,
+            Text = Text,
+        };
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Component.cs

@@ -0,0 +1,54 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Component : IComponentModel
+    {
+        public int Id { get; private set; }
+        [Required]
+        public string Name { get; private set; } = string.Empty;
+        [Required]
+        public double Cost { get; set; }
+        [Required]
+        public virtual StoreKeeper? StoreKeeperЗЛ { get; set; }
+        [NotMapped]
+        public IStoreKeeperModel? StoreKeeper { get; set; }
+
+        [ForeignKey("ComponentId")]
+        public virtual List<ProductComponent> ProductComponents { get; set; } = new();
+        public static Component? Create(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Cost = model.Cost,
+                StoreKeeper = model.StoreKeeper
+            };
+        }
+        public void Update (ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Name = string.IsNullOrEmpty(model.Name) ? Name : model.Name;
+            Cost = model.Cost;
+        }
+
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Cost = Cost
+        };
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Order.cs

@@ -0,0 +1,84 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Enums;
+using ComputerHardwareStoreDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int Id { get; private set; }
+        [Required]
+        public int Count { get; set; }
+        [Required]
+        public double Sum { get; set; }
+        [Required]
+        public OrderStatus Status { get; set; } = OrderStatus.Неизвестен;
+        [Required]
+        public DateTime DateCreate { get; set; } = DateTime.Now;
+        public DateTime? DateImplement { get; set; }
+
+        private Dictionary<int, (IProductModel, int)>? _orderProducts = null;
+        [NotMapped]
+        public Dictionary<int, (IProductModel, int)> OrderProducts 
+        {
+            get
+            {
+                if (_orderProducts == null)
+                {
+                    _orderProducts = Products
+                        .ToDictionary(
+                            op => op.ProductId, 
+                            op => (op.Product as IProductModel, op.Count));
+                }
+                return _orderProducts;
+            }
+        }
+        [ForeignKey("OrderId")]
+        public virtual List<OrderProduct> Products { get; set; } = new();
+        public static Order? Create(ComputerHardwareStoreDBContext context, OrderBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement,
+                Products = context.Products
+                    .Where(p => model.OrderProducts.ContainsKey(p.Id))
+                    .Select(p => new OrderProduct()
+                    {
+                        OrderId = model.Id,
+                        ProductId = p.Id,
+                        Product = p,
+                        Count = model.OrderProducts[p.Id].Item2
+                    })
+                    .ToList()
+            };
+        }
+        public void Update(OrderBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Status = model.Status;
+            DateImplement = model.DateImplement;
+        }
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement,
+        };
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/OrderProduct.cs

@@ -0,0 +1,17 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class OrderProduct
+    {
+        public int Id { get; set; }
+        [Required]
+        public int OrderId { get; set; }
+        [Required]
+        public int ProductId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        public virtual Product Product { get; set; } = new();
+        public virtual Order Order { get; set; } = new();
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Product.cs

@@ -0,0 +1,98 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Product : IProductModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public string Name { get; set; } = string.Empty;
+        [Required]
+        public double Price { get; set; }
+        private Dictionary<int, (IComponentModel, int)>? _productComponents = null;
+        [NotMapped]
+        public Dictionary<int, (IComponentModel, int)> ProductComponents
+        {
+            get
+            {
+                if (_productComponents == null)
+                {
+                    _productComponents = Components
+                        .ToDictionary(c => c.ComponentId, c => (c.Component as IComponentModel, c.Count));
+                }
+                return _productComponents;
+            }
+        }
+        [ForeignKey("ProductId")]
+        public virtual List<ProductComponent> Components { get; set; } = new();
+        [ForeignKey("ProductId")]
+        public virtual List<Order> Orders { get; set; } = new();
+        public static Product Create(ComputerHardwareStoreDBContext context, ProductBindingModel model)
+        {
+            return new Product()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Price = model.Price,
+                Components = context.Components
+                    .Where(c => model.ProductComponents.ContainsKey(c.Id))
+                    .Select(c => new ProductComponent()
+                    {
+                        ProductId = model.Id,
+                        ComponentId = c.Id,
+                        Component = c,
+                        Count = model.ProductComponents[c.Id].Item2
+                    }).ToList(),
+            };
+        }
+        public void Update(ProductBindingModel model)
+        {
+            Name = string.IsNullOrEmpty(model.Name) ? Name : model.Name;
+            Price = model.Price;
+            
+        }
+        public ProductViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Price = Price,
+            ProductComponents = ProductComponents
+        };
+
+        public static void UpdateComponents(ComputerHardwareStoreDBContext context, ProductBindingModel model)
+        {
+            var productComponents = context.ProductComponents
+                .Where(pc => pc.ProductId == model.Id)
+                .ToList();
+            if (productComponents.Count != 0 && productComponents.Count > 0)
+            {
+                // удалили те, которых нет в модели
+                context.ProductComponents
+                    .Where(pc => !model.ProductComponents.ContainsKey(pc.ComponentId))
+                    .ExecuteDelete();
+                // обновили количество у существующих записей
+                productComponents
+                    .ForEach(updateComponent =>
+                    {
+                        updateComponent.Count = model.ProductComponents[updateComponent.ComponentId].Item2;
+                        model.ProductComponents.Remove(updateComponent.ComponentId);
+                    });  
+            }
+            // добавили новые
+            context.ProductComponents
+                .AddRange(model.ProductComponents.Values
+                .Select(val => new ProductComponent()
+                {
+                    ProductId = model.Id,
+                    ComponentId = val.Item1.Id,
+                    Count = val.Item2
+                }));
+            context.SaveChanges();
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/ProductComponent.cs

@@ -0,0 +1,17 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class ProductComponent
+    {
+        public int Id { get; set; }
+        [Required]
+        public int ProductId { get; set; }
+        [Required]
+        public int ComponentId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        public virtual Component Component { get; set; } = new();
+        public virtual Product Product { get; set; } = new();
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Purchase.cs

@@ -0,0 +1,159 @@
+
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Purchase : IPurchaseModel
+    {
+        public int Id { get; private set; }
+        [Required]
+        public int VendorId { get; set; }
+        [Required]
+        public double Cost { get; set; }
+        [Required]
+        public DateTime DateCreate { get; set; } = DateTime.Now;
+        public DateTime? DateImplement { get; set; } = null;
+        private Dictionary<int, (IBuildModel, int)>? _purchaseBuilds = null;
+        [NotMapped]
+        public Dictionary<int, (IBuildModel, int)> PurchaseBuilds
+        {
+            get
+            {
+                if (_purchaseBuilds == null)
+                {
+                    _purchaseBuilds = Builds
+                        .ToDictionary(op => op.BuildId, op => (op.Build as IBuildModel, op.Count));
+                }
+                return _purchaseBuilds;
+            }
+        }
+
+        [ForeignKey("PurchaseId")]
+        public virtual List<PurchaseBuild> Builds { get; set; } = new();
+        private Dictionary<int, (IProductModel, int)>? _purchaseProducts = null;
+        [NotMapped]
+        public Dictionary<int, (IProductModel, int)> PurchaseProducts
+        {
+            get
+            {
+                if (_purchaseProducts == null)
+                {
+                    _purchaseProducts = Products
+                        .ToDictionary(op => op.ProductId, op => (op.Product as IProductModel, op.Count));
+                }
+                return _purchaseProducts;
+            }
+        }
+        [ForeignKey("PurchaseId")]
+        public virtual List<PurchaseProduct> Products { get; set; } = new();
+
+        public static Purchase Create(ComputerHardwareStoreDBContext context, PurchaseBindingModel model)
+        {
+            return new Purchase()
+            {
+                Id = model.Id,
+                Cost = model.Cost,
+                DateCreate = model.DateCreate,
+                Builds = context.Builds
+                    .Where(b => model.PurchaseBuilds.ContainsKey(b.Id))
+                    .Select(b => new PurchaseBuild()
+                    {
+                        PurchaseId = model.Id,
+                        BuildId = b.Id,
+                        Build = b,
+                        Count = model.PurchaseProducts[b.Id].Item2
+                    }).ToList(),
+                Products = context.Products
+                    .Where(p => model.PurchaseProducts.ContainsKey(p.Id))
+                    .Select (p => new PurchaseProduct()
+                    {
+                        PurchaseId = model.Id,
+                        ProductId = p.Id,
+                        Product = p,
+                        Count = model.PurchaseProducts[p.Id].Item2
+                    })
+                    .ToList()
+            };
+        }
+        public void Update(PurchaseBindingModel model)
+        {
+            Cost = model.Cost;
+
+        }
+        public PurchaseViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Cost = Cost,
+            DateCreate = DateCreate,
+            PurchaseBuilds = PurchaseBuilds,
+            PurchaseProducts = PurchaseProducts
+        };
+
+        public static void UpdateBuilds(ComputerHardwareStoreDBContext context, PurchaseBindingModel model)
+        {
+            var productBuilds = context.PurchaseBuilds
+                .Where(pc => pc.PurchaseId == model.Id)
+                .ToList();
+            if (productBuilds.Count != 0 && productBuilds.Count > 0)
+            {
+                // удалили те, которых нет в модели
+                context.PurchaseBuilds
+                    .Where(pc => !model.PurchaseBuilds.ContainsKey(pc.BuildId))
+                    .ExecuteDelete();
+                // обновили количество у существующих записей
+                productBuilds
+                    .ForEach(updateBuild =>
+                    {
+                        updateBuild.Count = model.PurchaseBuilds[updateBuild.BuildId].Item2;
+                        model.PurchaseBuilds.Remove(updateBuild.BuildId);
+                    });
+            }
+            // добавили новые
+            context.PurchaseBuilds
+                .AddRange(model.PurchaseBuilds.Values
+                .Select(val => new PurchaseBuild()
+                {
+                    PurchaseId = model.Id,
+                    BuildId = val.Item1.Id,
+                    Count = val.Item2
+                }));
+            context.SaveChanges();
+        }
+
+        public static void UpdateProducts(ComputerHardwareStoreDBContext context, PurchaseBindingModel model)
+        {
+            var productProducts = context.PurchaseProducts
+                .Where(pc => pc.PurchaseId == model.Id)
+                .ToList();
+            if (productProducts.Count != 0 && productProducts.Count > 0)
+            {
+                // удалили те, которых нет в модели
+                context.PurchaseProducts
+                    .Where(pc => !model.PurchaseProducts.ContainsKey(pc.ProductId))
+                    .ExecuteDelete();
+                // обновили количество у существующих записей
+                productProducts
+                    .ForEach(updateProduct =>
+                    {
+                        updateProduct.Count = model.PurchaseProducts[updateProduct.ProductId].Item2;
+                        model.PurchaseProducts.Remove(updateProduct.ProductId);
+                    });
+            }
+            // добавили новые
+            context.PurchaseProducts
+                .AddRange(model.PurchaseProducts.Values
+                .Select(val => new PurchaseProduct()
+                {
+                    PurchaseId = model.Id,
+                    ProductId = val.Item1.Id,
+                    Count = val.Item2
+                }));
+            context.SaveChanges();
+        }
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/PurchaseBuild.cs

@@ -0,0 +1,18 @@
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class PurchaseBuild
+    {
+        public int Id { get; set; }
+        [Required]
+        public int PurchaseId { get; set; }
+        [Required]
+        public int BuildId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        public virtual Purchase Purchase { get; set; } = new();
+        public virtual Build Build { get; set; } = new();
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/PurchaseProduct.cs

@@ -0,0 +1,18 @@
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+   public class PurchaseProduct
+   {
+        public int Id { get; set; }
+        [Required]
+        public int PurchaseId { get; set; }
+        [Required]
+        public int ProductId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        public virtual Purchase Purchase { get; set; } = new();
+        public virtual Product Product { get; set; } = new();
+   }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/StoreKeeper.cs

@@ -0,0 +1,56 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class StoreKeeper : IStoreKeeperModel
+    {
+        public int Id { get; private set; }
+        [Required]
+        public string Name { get; private set; } = string.Empty;
+        [Required]
+
+        public string Login { get; private set; } = string.Empty;
+        [Required]
+        public string Password { get; private set; } = string.Empty;
+        [ForeignKey("StoreKeeperId")]
+        public virtual List<Product> Products { get; set; } = new();
+        [ForeignKey("StoreKeeperId")]
+        public virtual List<Component> Components { get; set; } = new();
+
+        public static StoreKeeper? Create(ComputerHardwareStoreDBContext context, StoreKeeperBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new StoreKeeper()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Login = model.Login,
+                Password = model.Password,
+            };
+        }
+        public void Update(StoreKeeperBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Name = string.IsNullOrEmpty(model.Name) ? Name : model.Name;
+            Password = string.IsNullOrEmpty(model.Password) ? Password : model.Password;
+        }
+
+        public StoreKeeperViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Login = Login,
+            Password = Password
+        };
+    }
+}

ComputerHardwareStore/ComputerHardwareStoreDatabaseImplement/Models/Vendor.cs

@@ -0,0 +1,57 @@
+using ComputerHardwareStoreContracts.BindingModels;
+using ComputerHardwareStoreContracts.ViewModels;
+using ComputerHardwareStoreDataModels.Models;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ComputerHardwareStoreDatabaseImplement.Models
+{
+    public class Vendor : IVendorModel
+    {
+        public int Id { get; private set; }
+        [Required]
+        public string Name { get; private set; } = string.Empty;
+        [Required]
+
+        public string Login { get; private set; } = string.Empty;
+        [Required]
+
+        public string Password { get; private set; } = string.Empty;
+        [ForeignKey("VendorId")]
+        public virtual List<Purchase> Purchases { get; set; } = new();
+        [ForeignKey("VendorId")]
+        public virtual List<Build> Builds { get; set; } = new();
+
+        public static Vendor? Create(ComputerHardwareStoreDBContext context, VendorBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Vendor()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Login = model.Login,
+                Password = model.Password,
+            };
+        }
+        public void Update(VendorBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Name = string.IsNullOrEmpty(model.Name) ? Name : model.Name;
+            Password = string.IsNullOrEmpty(model.Password) ? Password : model.Password;
+        }
+
+        public VendorViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Login = Login,
+            Password = Password
+        };
+    }
+}