Реализовать удаление.

***
- пофиксили ошибку миграций: пришлось удалить миграции и создать заново. (на удаленный репозиторий не был добавлей файл дизайнер миграций.)
- Реализовали удаление смартфона из БД с подтверждением.
- Добавили страницу ошибок.
- Удалили форму с главной страницы.
***

PhoneStore/Controllers/ErrorsController.cs

+using System.Collections.Generic;
+using Microsoft.AspNetCore.Mvc;
+using PhoneStore.ViewModels;
+
+namespace PhoneStore.Controllers
+{
+    public class ErrorsController : Controller
+    {
+        private readonly Dictionary<int, ErrorViewModel> _errorResolver;
+
+        public ErrorsController()
+        {
+            _errorResolver = new Dictionary<int, ErrorViewModel>();
+            _errorResolver.Add(404, new ErrorViewModel
+            {
+                StatusCode = 404,
+                Message = "Ресурс не найден",
+                Title = "Oops... Страница не найдена"
+            });
+            _errorResolver.Add(400, new ErrorViewModel
+            {
+                StatusCode = 400,
+                Message = "Сервер не смог обработать запрос",
+                Title = "Oops... Ошибка"
+            });
+            _errorResolver.Add(500, new ErrorViewModel
+            {
+                StatusCode = 500,
+                Message = "Сервер не смог обработать запрос",
+                Title = "Oops... Ошибка"
+            });
+            _errorResolver.Add(777, new ErrorViewModel
+            {
+                StatusCode = 777,
+                Message = "Сущность не найдена",
+                Title = "Oops... Ошибка"
+            });
+        }
+
+        [Route("Error/{statusCode}")]
+        [ActionName("Error")]
+        public IActionResult HttpStatusCodeHandler(int statusCode)
+        {
+            if (_errorResolver.ContainsKey(statusCode))
+            {
+                return View(_errorResolver[statusCode]);
+            }
+            return View(_errorResolver[404]);
+        }
+    }
+}
\ No newline at end of file

PhoneStore/Controllers/HomeController.cs

@@ -86,15 +86,10 @@ namespace PhoneStore.Controllers
         {
             return "tets";
         }
+
         public IActionResult Privacy()
         {
             return View();
         }
-
-        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
-        public IActionResult Error()
-        {
-            return View(new ErrorViewModel {RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier});
-        }
     }
 }
\ No newline at end of file

PhoneStore/Controllers/OrdersController.cs

@@ -29,7 +29,7 @@ namespace PhoneStore.Controllers
         {
             var phone = _db.Phones.FirstOrDefault(p => p.Id == phoneId);
             if (phone is null)
-                return Content("Такого телефона нет.");
+                return RedirectToAction("Error", "Errors", new {statusCode = 777});
             Order order = new Order
             {
                 Phone = phone

PhoneStore/Controllers/PhoneController.cs → PhoneStore/Controllers/PhonesController.cs

@@ -6,11 +6,11 @@ using PhoneStore.Models;
 
 namespace PhoneStore.Controllers
 {
-    public class PhoneController : Controller
+    public class PhonesController : Controller
     {
         private readonly MobileContext _db;
 
-        public PhoneController(MobileContext db)
+        public PhonesController(MobileContext db)
         {
             _db = db;
         }
@@ -39,5 +39,28 @@ namespace PhoneStore.Controllers
             _db.SaveChanges();
             return RedirectToAction("Index");
         }
+
+        [HttpGet]
+        public IActionResult Delete(int phoneId)
+        {
+            var phone = _db.Phones.FirstOrDefault(p => p.Id == phoneId);
+            if (phone is null)
+                return BadRequest();
+            
+            return View(phone);
+        }
+        
+        [HttpPost]
+        [ActionName("Delete")]
+        public IActionResult Confirm(int phoneId)
+        {
+            var phone = _db.Phones.FirstOrDefault(p => p.Id == phoneId);
+            if (phone is null)
+                return BadRequest();
+            _db.Phones.Remove(phone);
+            _db.SaveChanges();
+            
+            return RedirectToAction("Index");
+        }
     }
 }
\ No newline at end of file

PhoneStore/Migrations/20220616111154_AddBasketEntity.cs

-using Microsoft.EntityFrameworkCore.Migrations;
-
-namespace PhoneStore.Migrations
-{
-    public partial class AddBasketEntity : Migration
-    {
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.CreateTable(
-                name: "Baskets",
-                columns: table => new
-                {
-                    Id = table.Column<int>(type: "INTEGER", nullable: false)
-                        .Annotation("Sqlite:Autoincrement", true),
-                    PhoneId = table.Column<int>(type: "INTEGER", nullable: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_Baskets", x => x.Id);
-                    table.ForeignKey(
-                        name: "FK_Baskets_Phones_PhoneId",
-                        column: x => x.PhoneId,
-                        principalTable: "Phones",
-                        principalColumn: "Id",
-                        onDelete: ReferentialAction.Cascade);
-                });
-
-            migrationBuilder.CreateIndex(
-                name: "IX_Baskets_PhoneId",
-                table: "Baskets",
-                column: "PhoneId");
-        }
-
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropTable(
-                name: "Baskets");
-        }
-    }
-}

PhoneStore/Migrations/20220616111154_AddBasketEntity.Designer.cs → PhoneStore/Migrations/20220622133702_Init.Designer.cs

@@ -8,8 +8,8 @@ using PhoneStore.Models;
 namespace PhoneStore.Migrations
 {
     [DbContext(typeof(MobileContext))]
-    [Migration("20220616111154_AddBasketEntity")]
-    partial class AddBasketEntity
+    [Migration("20220622133702_Init")]
+    partial class Init
     {
         protected override void BuildTargetModel(ModelBuilder modelBuilder)
         {

PhoneStore/Migrations/20220613142445_Initial.cs → PhoneStore/Migrations/20220622133702_Init.cs

@@ -2,7 +2,7 @@
 
 namespace PhoneStore.Migrations
 {
-    public partial class Initial : Migration
+    public partial class Init : Migration
     {
         protected override void Up(MigrationBuilder migrationBuilder)
         {
@@ -21,6 +21,25 @@ namespace PhoneStore.Migrations
                     table.PrimaryKey("PK_Phones", x => x.Id);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "Baskets",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    PhoneId = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Baskets", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Baskets_Phones_PhoneId",
+                        column: x => x.PhoneId,
+                        principalTable: "Phones",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
             migrationBuilder.CreateTable(
                 name: "Orders",
                 columns: table => new
@@ -43,6 +62,11 @@ namespace PhoneStore.Migrations
                         onDelete: ReferentialAction.Cascade);
                 });
 
+            migrationBuilder.CreateIndex(
+                name: "IX_Baskets_PhoneId",
+                table: "Baskets",
+                column: "PhoneId");
+
             migrationBuilder.CreateIndex(
                 name: "IX_Orders_PhoneId",
                 table: "Orders",
@@ -51,6 +75,9 @@ namespace PhoneStore.Migrations
 
         protected override void Down(MigrationBuilder migrationBuilder)
         {
+            migrationBuilder.DropTable(
+                name: "Baskets");
+
             migrationBuilder.DropTable(
                 name: "Orders");
 

PhoneStore/Models/ErrorViewModel.cs

-using System;
-
-namespace PhoneStore.Models
-{
-    public class ErrorViewModel
-    {
-        public string RequestId { get; set; }
-
-        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
-    }
-}
\ No newline at end of file

PhoneStore/PhoneStore.csproj

@@ -17,7 +17,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <Folder Include="Pages" />
+      <Folder Include="Migrations" />
     </ItemGroup>
 
 </Project>

PhoneStore/Startup.cs

@@ -56,6 +56,7 @@ namespace PhoneStore
             if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
+                app.UseStatusCodePagesWithRedirects("/Error/{0}");
             }
             else
             {

PhoneStore/ViewModels/ErrorViewModel.cs

+namespace PhoneStore.ViewModels
+{
+    public class ErrorViewModel
+    {
+        public int StatusCode { get; set; }
+        public string Title { get; set; }
+        public string Message { get; set; }
+    }
+}
\ No newline at end of file

PhoneStore/Views/Home/Index.cshtml

@@ -5,10 +5,4 @@
 <div class="text-center">
     <h1 class="display-4">Welcome</h1>
     <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
-</div>
-
-<form asp-action="Test">
-    <input type="text" name="id" placeholder="id">
-    <input type="text" name="quantity" placeholder="quantity">
-    <button type="submit">Отправить</button>
-</form>
\ No newline at end of file
+</div>
\ No newline at end of file

PhoneStore/Views/Phone/Create.cshtml → PhoneStore/Views/Phones/Create.cshtml

@@ -8,7 +8,7 @@
 <h2>Заполните форму для добавления устройства</h2>
 <div class="row">
     <div class="phone_add_form col-md-6">
-        <form asp-action="Create" asp-controller="Phone" method="post">
+        <form asp-action="Create" asp-controller="Phones" method="post">
             <div class="form_row">
                 <label for="name">
                     Наименование

PhoneStore/Views/Phones/Delete.cshtml

+@model Phone
+
+@{
+    ViewBag.Title = "title";
+    Layout = "_Layout";
+}
+
+<div class="card text-center">
+    <div class="card-header">
+        Ахтунг!
+    </div>
+    <div class="card-body">
+        <h5 class="card-title">Вы уверены?</h5>
+        <p class="card-text">Данные могут быть безвозвратно удалены.</p>
+        <form asp-action="Delete" asp-controller="Phones" method="post">
+            <input type="text" name="phoneId" value="@Model.Id" hidden>
+            <a class="btn btn-outline-warning" asp-action="Index">Отмена</a>
+            <button class="btn btn-danger">Удалить</button>
+        </form>
+    </div>
+</div>
\ No newline at end of file

PhoneStore/Views/Phone/Index.cshtml → PhoneStore/Views/Phones/Index.cshtml

@@ -5,7 +5,7 @@
     Layout = "_Layout";
 }
 
-<a asp-action="Create" asp-controller="Phone">Добавить устройство</a>
+<a asp-action="Create" asp-controller="Phones">Добавить устройство</a>
 @* https://localhost:5001/Phone/Create method GET*@
 @if (Model.Count == 0)
 {
@@ -46,6 +46,14 @@ else
                         Заказать
                     </a>
                 </td>
+                <td>
+                    <a asp-route-phoneId="@phone.Id"
+                       asp-action="Delete"
+                       asp-controller="Phones"
+                       class="btn btn-danger">
+                        Удалить
+                    </a>
+                </td>
             </tr>
         }
     </table>

PhoneStore/Views/Shared/Error.cshtml

-@model ErrorViewModel
-@{
-    ViewData["Title"] = "Error";
-}
-
-<h1 class="text-danger">Error.</h1>
-<h2 class="text-danger">An error occurred while processing your request.</h2>
-
-@if (Model.ShowRequestId)
-{
-    <p>
-        <strong>Request ID:</strong> <code>@Model.RequestId</code>
-    </p>
-}
-
-<h3>Development Mode</h3>
-<p>
-    Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
-</p>
-<p>
-    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
-    It can result in displaying sensitive information from exceptions to end users.
-    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
-    and restarting the app.
-</p>
\ No newline at end of file

PhoneStore/Views/Shared/_Layout.cshtml

@@ -25,7 +25,7 @@
                         <a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
                     </li>
                     <li class="nav-item">
-                        <a class="nav-link text-dark" asp-area="" asp-controller="Phone" asp-action="Index">Смартфоны</a>
+                        <a class="nav-link text-dark" asp-area="" asp-controller="Phones" asp-action="Index">Смартфоны</a>
                     </li>
                     <li class="nav-item">
                         <a class="nav-link text-dark" asp-area="" asp-controller="Orders" asp-action="Index">Заказы</a>