Как выявить ошибку при иницилизации БД в Asp.Net core & ef.core?

Question

[Iqbol]

Добрый день.

Подскажите пожалуйста в чем может быт проблема.
Не проходить процесс инициализации БД в EntityFramework.Core при том что миграции создаются без каких либо ошибок.

>dotnet ef database update

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:03.76
System.ArgumentException: GenericArguments[0], 'MobileStore.Migrations.MobileContext', on 'Microsoft.EntityFrame
workCore.Infrastructure.IDbContextFactory`1[TContext]' violates the constraint of type 'TContext'. ---> System.T
ypeLoadException: GenericArguments[0], 'MobileStore.Migrations.MobileContext', on 'Microsoft.EntityFrameworkCore
.Infrastructure.IDbContextFactory`1[TContext]' violates the constraint of type parameter 'TContext'.
   at System.RuntimeTypeHandle.Instantiate(Type[] inst)
   at System.RuntimeType.MakeGenericType(Type[] instantiation)
   --- End of inner exception stack trace ---
   at System.RuntimeType.ValidateGenericArguments(MemberInfo definition, RuntimeType[] genericArguments, Excepti
on e)
at System.RuntimeType.MakeGenericType(Type[] instantiation)
   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.FindContextFactory(Type contextType)
   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.FindContextTypes()
   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.FindContextType(String name)
   at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(String contextType)
   at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.UpdateDatabase(String targetMigration,
String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabase.<>c__DisplayClass0_1.<.ctor>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
GenericArguments[0], 'MobileStore.Migrations.MobileContext', on 'Microsoft.EntityFrameworkCore.Infrastructure.ID
bContextFactory`1[TContext]' violates the constraint of type 'TContext'.

Класс контекста данных:

using Microsoft.EntityFrameworkCore;
 
namespace MobileStore.Models
{
    public class MobileContext : DbContext
    {
        public DbSet<Phone> Phones { get; set; }
        public DbSet<Order> Orders { get; set; }
 
        public MobileContext(DbContextOptions<MobileContext> options)
            : base(options)
        {
        }
    }
}

Answer 1

[Iqbol]

Вопрос закрыт !
Оказалось что я не указывал имя файла контекста данных во время миграции:

>dotnet ef migrations add MobileStore --context MobileContext
Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:02.14
Done. To undo this action, use 'ef migrations remove'

>dotnet ef database update

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:03.89
Done.

Answer 2

[FreeBa]

А миграции к самой базе применяются? Покажите инициализатор

Comments

[Iqbol]

Вроде бы да.

dotnet ef migrations add MobileContext

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:18.77
Done. To undo this action, use 'ef migrations remove'

MobileContextModelSnapshot.cs:

using System;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Metadata;
using Microsoft.EntityFrameworkCore.Migrations;
using MobileStore.Models;

namespace MobileStore.Migrations
{
    [DbContext(typeof(MobileContext))]
    partial class MobileContextModelSnapshot : ModelSnapshot
    {
        protected override void BuildModel(ModelBuilder modelBuilder)
        {
            modelBuilder
                .HasAnnotation("ProductVersion", "1.1.1")
                .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);

            modelBuilder.Entity("MobileStore.Models.Order", b =>
                {
                    b.Property<int>("OrderId")
                        .ValueGeneratedOnAdd();

                    b.Property<string>("Address");

                    b.Property<string>("ContactPhone");

                    b.Property<int>("PhoneId");

                    b.Property<string>("User");

                    b.HasKey("OrderId");

                    b.HasIndex("PhoneId");

                    b.ToTable("Orders");
                });

            modelBuilder.Entity("MobileStore.Models.Phone", b =>
                {
                    b.Property<int>("Id")
                        .ValueGeneratedOnAdd();

                    b.Property<string>("Company");

                    b.Property<string>("Name");

                    b.Property<int>("Price");

                    b.HasKey("Id");

                    b.ToTable("Phones");
                });

            modelBuilder.Entity("MobileStore.Models.Order", b =>
                {
                    b.HasOne("MobileStore.Models.Phone", "Phone")
                        .WithMany()
                        .HasForeignKey("PhoneId")
                        .OnDelete(DeleteBehavior.Cascade);
                });
        }
    }
}

[FreeBa]

Это не то. Я имел ввиду что-то вроде

using (var serviceScope = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>().CreateScope())
{
       var context = serviceScope.ServiceProvider.GetService<MyContext>();       
       context.Database.Migrate();
       context.EnsureSeedData();
 }

В Startup.cs