遷移驗證到核2.0：實體類型「IdentityUserRole <int>」需要定義

Question

我遷移我的應用程序ASP.Net核2.0主鍵。

https://docs.microsoft.com/en-us/aspnet/core/migration/1x-to-2x/identity-2x

在上面的文章，它具有以下映射：

protected override void OnModelCreating(ModelBuilder builder) 
{ 
    base.OnModelCreating(builder); 
    // 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>() 
     .HasMany(e => e.Claims) 
     .WithOne() 
     .HasForeignKey(e => e.UserId) 
     .IsRequired() 
     .OnDelete(DeleteBehavior.Cascade); 

    builder.Entity<ApplicationUser>() 
     .HasMany(e => e.Logins) 
     .WithOne() 
     .HasForeignKey(e => e.UserId) 
     .IsRequired() 
     .OnDelete(DeleteBehavior.Cascade); 

    builder.Entity<ApplicationUser>() 
     .HasMany(e => e.Roles) 
     .WithOne() 
     .HasForeignKey(e => e.UserId) 
     .IsRequired() 
     .OnDelete(DeleteBehavior.Cascade); 
} 

它看起來好像沒什麼問題。然而，當我運行

dotnet ef migrations add InitialCreate 

我得到以下錯誤：

The entity type 'IdentityUserRole' requires a primary key to be defined.

ApplicationUser定義如下：

public class ApplicationUser : IdentityUser 
{ 
    /// <summary> 
    /// Navigation property for the roles this user belongs to. 
    /// </summary> 
    public virtual ICollection<IdentityUserRole<int>> Roles { get; } = new List<IdentityUserRole<int>>(); 

    /// <summary> 
    /// Navigation property for the claims this user possesses. 
    /// </summary> 
    public virtual ICollection<IdentityUserClaim<int>> Claims { get; } = new List<IdentityUserClaim<int>>(); 

    /// <summary> 
    /// Navigation property for this users login accounts. 
    /// </summary> 
    public virtual ICollection<IdentityUserLogin<int>> Logins { get; } = new List<IdentityUserLogin<int>>(); 

    public string FullName { get; set; } 
} 

有什麼不對的映射？

Answer 1

嘗試增加

builder.Entity<IdentityUserRole<int>>().HasKey(p => new { p.UserId, p.RoleId});