如何爲繼承IdentityUser的類創建主鍵

Question

我已經使用Identity 2.0創建了MVC 5網站。我正在使用整數作爲主鍵。

當我嘗試創建一個模型的關聯ApplicationUser我得到以下錯誤：

EntityType 'ApplicationUserRole' has no key defined.

什麼我需要做什麼來解決這個錯誤？

IdentityModels.cs

public class ApplicationUserLogin : IdentityUserLogin<int> { } 
public class ApplicationUserClaim : IdentityUserClaim<int> { } 
public class ApplicationUserRole : IdentityUserRole<int> { } 

public class ApplicationRole : IdentityRole<int, ApplicationUserRole>, IRole<int> 
{ 
    public string Description { get; set; } 

    public ApplicationRole() : base() { } 
    public ApplicationRole(string name) : this() 
    { 
    this.Name = name; 
    } 

    public ApplicationRole(string name, string description) : this(name) 
    { 
    this.Description = description; 
    } 
} 

public class ApplicationUser : IdentityUser<int, ApplicationUserLogin, ApplicationUserRole, ApplicationUserClaim>, IUser<int> 
{ 
    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser, int> manager) 
    { 
    var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie); 
    return userIdentity; 
    } 

    public string FullName { get; set; } 

    public virtual ICollection<Employee> Employees { get; set; } 
} 

Employee.cs

public class Employee 
{ 
    public int Id { get; set; } 

    public string Title { get; set; } 

    public virtual ApplicationUser User { get; set; } 
} 

Answer 1

你需要重寫OnModelCreating方法來定義主鍵：

protected override void OnModelCreating(DbModelBuilder modelBuilder) 
{ 
    modelBuilder.Entity<ApplicationUserLogin>().HasKey<int>(l => l.UserId); 
    modelBuilder.Entity<ApplicationRole>().HasKey<int>(r => r.Id); 
    modelBuilder.Entity<ApplicationUserRole>().HasKey(r => new { r.RoleId, r.UserId }); 
} 

這裏有一個類似的線程： User in Entity type MVC5 EF6