EF 6 代码优先 找不到对象"dbo.AspNetUserRoles"，因为它不存在或您没有权限

Question

我正在尝试使用代码优先的方法将表和数据迁移到我现有的数据库。
当我运行Add-Migration [somename]时，我最终得到以下例外:

Cannot find the object "dbo.AspNetUserRoles" because it does not exist or you do not have permissions.

现在这里的交易，我的表被命名为aspnet_Users, aspnet_UserRoles等。如您所见，我生成的迁移文件将表名大写。我尝试手动重命名这些，不幸的是没有任何进展。我似乎弄不明白是什么原因造成的。

我的数据库实体是这样的:

public partial class MyDBContext : IdentityDbContext<ApplicationUser>
{
    public FunkaDbContext()
        : base("name=MyDBContext", throwIfV1Schema: false)
    {
        Database.SetInitializer<MyDBContext>(new DropCreateDatabaseIfModelChanges<MyDBContext>());
    }
    public virtual DbSet<educationSignup> EducationSignups { get; set; }
    public virtual DbSet<ParticipantsInformation> ParticipantsInformations { get; set; }
    public virtual DbSet<PaymentInformation> PaymentInformations { get; set; }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        modelBuilder.Entity<educationSignup>()
            .HasMany(e => e.participantsInformations)
            .WithRequired(e => e.educationSignup)
            .HasForeignKey(e => e.SignupId)
            .WillCascadeOnDelete(false);
        modelBuilder.Entity<educationSignup>()
            .HasMany(e => e.paymentInformations)
            .WithRequired(e => e.educationSignup)
            .HasForeignKey(e => e.SignupId)
            .WillCascadeOnDelete(false);
        modelBuilder.Entity<IdentityUser>().HasKey<string>(u => u.Id);
        modelBuilder.Entity<IdentityRole>().HasKey<string>(r => r.Id);
        modelBuilder.Entity<IdentityUserRole>().HasKey(r => new { r.RoleId, r.UserId });
    }
    public static MyDbContext Create()
    {
        return new MyDbContext();
    }
}

Answer 1

删除db中的迁移历史，并为您的上下文使用底部映射

 base.OnModelCreating(modelBuilder);
 modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
 modelBuilder.Entity<IdentityUserRole>()
            .HasKey(r => new { r.UserId, r.RoleId })
            .ToTable("AspNetUserRoles");
 modelBuilder.Entity<IdentityUserLogin>()
            .HasKey(l => new { l.LoginProvider, l.ProviderKey, l.UserId })
            .ToTable("AspNetUserLogins");