避免使用AspNetUsers,AspNetRoles和AspNetUserRoles的"鉴别器"

Question

我正在扩展IdentityUser,IdentityUserRole并且IdentityRole像这样:

public class ApplicationUser : IdentityUser
{
    public string FullName { get; set; }

    public virtual ICollection<ApplicationIdentityUserRole> Roles { get; } = new List<ApplicationIdentityUserRole>();
}

public class ApplicationIdentityUserRole : IdentityUserRole<string>
{
    public virtual ApplicationUser User { get; set; }
    public virtual ApplicationRole Role { get; set; }
}

public class ApplicationRole : IdentityRole
    {
        public virtual ICollection<ApplicationIdentityUserRole> Roles { get; } = new List<ApplicationIdentityUserRole>();
    }

并配置如下:

public class SmartAccountingSetUpContext : IdentityDbContext<ApplicationUser>
{
    public SmartAccountingSetUpContext(DbContextOptions<SmartAccountingSetUpContext> options)
        : base(options)
    {

    }

    public DbSet<ApplicationUser> Users { get; set; }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);

        builder.Ignore<RegistrationViewModel>();
        // Customize the ASP.NET Identity model and override the defaults if needed.
        // For example, you can rename the ASP.NET Identity table names and more.
        // Add your customizations after calling base.OnModelCreating(builder);            
        builder.Entity<ApplicationUser>().ToTable("AspNetUsers");
        builder.Entity<ApplicationIdentityUserRole>().ToTable("AspNetUserRoles");
        builder.Entity<ApplicationRole>().ToTable("AspNetRoles");           


        builder.Entity<ApplicationIdentityUserRole>()
                    .HasOne(p => p.User)
                    .WithMany(b => b.Roles)
                    .HasForeignKey(p => p.UserId);

        builder.Entity<ApplicationIdentityUserRole>()
            .HasOne(x => x.Role)
            .WithMany(x => x.Roles)
            .HasForeignKey(p => p.RoleId);
    }
}

我一直这样:

"Invalid column name 'Discriminator'.\r\nInvalid column name 'Discriminator'.\r\nInvalid column name 'Discriminator'.\r\nInvalid column name 'Discriminator'."

我知道如果你有派生类,那么你必须在OnModelCreating方法中指定HasDiscriminitor.但IdentityUser,IdentityUserRole和IdentityRole不是抽象类.

我怎么能通过这个？

Answer 1

您的上下文是继承IdentityDbContext<TUser>,继而继承IdentityDbContext<TUser, IdentityRole, string>.TUser在这种情况下是你的ApplicationUser,但角色类型是IdentityRole.

因此,基类fluent配置注册IdentityRole为实体.当您将派生的ApplicationRole实体注册时,EF Core会将其视为TPH(每个层次表)继承策略,该策略是使用具有Discriminator列的单个表实现的.

要解决此问题,只需使用正确的基础通用IdentityDbContext.由于您还具有自定义IdentityUserRole派生类型,因此应使用具有所有泛型类型参数的类型 - IdentityDbContext<TUser,TRole,TKey,TUserClaim,TUserRole,TUserLogin,TRoleClaim,TUserToken>:

public class SmartAccountingSetUpContext : IdentityDbContext
<
    ApplicationUser, // TUser
    ApplicationRole, // TRole
    string, // TKey
    IdentityUserClaim<string>, // TUserClaim
    ApplicationIdentityUserRole, // TUserRole,
    IdentityUserLogin<stringy>, // TUserLogin
    IdentityRoleClaim<string>, // TRoleClaim
    IdentityUserToken<string> // TUserToken
>
{
    // ...
}