#3 Добавил сущность отзыва о телефоне.

PhoneStore/Controllers/PhonesController.cs

@@ -142,11 +142,32 @@ namespace PhoneStore.Controllers
             if (!phoneId.HasValue) return RedirectToAction("Error", "Errors", new {statusCode = 777});
             var phone = _db.Phones
                 .Include(p => p.Brand)
+                .Include(p => p.Feedbacks)
+                    .ThenInclude(f => f.User)
                 .FirstOrDefault(p => p.Id == phoneId);
             if (phone is null)
                 return RedirectToAction("Error", "Errors", new {statusCode = 777});
-            
-            return View(phone);
+            var phoneViewModel = new PhoneViewModel
+            {
+                Brand = phone.Brand,
+                Feedbacks = phone.Feedbacks.Select(f => new FeedbackViewModel
+                {
+                    Id = f.Id,
+                    Phone = f.Phone,
+                    Text = f.Text,
+                    User = f.User,
+                    CreationDateTime = f.CreationDateTime,
+                    UserId = f.UserId,
+                    PhoneId = f.PhoneId
+                })
+                    .OrderByDescending(f => f.CreationDateTime)
+                    .ToList(),
+                Image = phone.Image,
+                Name = phone.Name,
+                Price = phone.Price,
+                Id = phone.Id
+            };
+            return View(phoneViewModel);
         }
     }
 }
\ No newline at end of file

PhoneStore/Migrations/20220807165430_AddCreationDateTimeField.cs

+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace PhoneStore.Migrations
+{
+    public partial class AddCreationDateTimeField : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTime>(
+                name: "CreationDateTime",
+                table: "Feedbacks",
+                type: "timestamp without time zone",
+                nullable: false,
+                defaultValue: new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified));
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "CreationDateTime",
+                table: "Feedbacks");
+        }
+    }
+}

PhoneStore/Migrations/MobileContextModelSnapshot.cs

@@ -159,6 +159,9 @@ namespace PhoneStore.Migrations
                         .HasColumnType("integer")
                         .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn);
 
+                    b.Property<DateTime>("CreationDateTime")
+                        .HasColumnType("timestamp without time zone");
+
                     b.Property<int>("PhoneId")
                         .HasColumnType("integer");
 

PhoneStore/Models/Feedback.cs

+using System;
+
 namespace PhoneStore.Models
 {
     public class Feedback
@@ -6,6 +8,7 @@ namespace PhoneStore.Models
         public int UserId { get; set; }
         public int PhoneId { get; set; }
         public string Text { get; set; }
+        public DateTime CreationDateTime { get; set; }
         public User User { get; set; }
         public Phone Phone { get; set; }
     }

PhoneStore/Models/Phone.cs

+using System.Collections.Generic;
+
 namespace PhoneStore.Models
 {
     public class Phone
@@ -8,5 +10,6 @@ namespace PhoneStore.Models
         public int? BrandId { get; set; }
         public Brand Brand { get; set; }
         public string Image { get; set; }
+        public List<Feedback> Feedbacks { get; set; }
     }
 }
\ No newline at end of file

PhoneStore/Services/PhoneService.cs

@@ -50,6 +50,5 @@ namespace PhoneStore.Services
             _db.Phones.Add(entity.MapToPhone(imagePath));
             await _db.SaveChangesAsync();
         }
-
     }
 }
\ No newline at end of file

PhoneStore/ViewModels/FeedbackCreateViewModel.cs

+namespace PhoneStore.ViewModels
+{
+    public class FeedbackCreateViewModel
+    {
+        public int UserId { get; set; }
+        public int PhoneId { get; set; }
+        public string Text { get; set; }
+    }
+}
\ No newline at end of file

PhoneStore/ViewModels/FeedbackViewModel.cs

+using System;
+using PhoneStore.Models;
+
+namespace PhoneStore.ViewModels
+{
+    public class FeedbackViewModel
+    {
+        public int Id { get; set; }
+        public int UserId { get; set; }
+        public int PhoneId { get; set; }
+        public string Text { get; set; }
+        public DateTime CreationDateTime { get; set; }
+        public User User { get; set; }
+        public Phone Phone { get; set; }
+    }
+}
\ No newline at end of file

PhoneStore/ViewModels/PhoneViewModel.cs

+using System.Collections.Generic;
+using PhoneStore.Models;
+
+namespace PhoneStore.ViewModels
+{
+    public class PhoneViewModel
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public decimal Price { get; set; }
+        public Brand Brand { get; set; }
+        public string Image { get; set; }
+        public List<FeedbackViewModel> Feedbacks { get; set; }
+    }
+}
\ No newline at end of file