EF 4.1的EntityType没有密钥 - 复合

Question

我刚刚升级到最新的EF 4.1代码优先使用的NuGet现在我收到关于我的映射错误。

我有这个类

public class UserApplication 
{ 
    [Key, Column(Order = 0)] 
    [DatabaseGenerated(DatabaseGeneratedOption.None)] 
    public int UserId { get; set; } 

    [Key, Column(Order = 1)] 
    [DatabaseGenerated(DatabaseGeneratedOption.None)] 
    public int ApplicationId { get; set; } 

    [ForeignKey("ApplicationId")] 
    public virtual Application Application { get; set; } 

    public DateTime SubscribedDate { get; set; } 
} 

而且我收到此错误：

System.Data.Edm.EdmEntityType: : EntityType 'UserApplication' has no key defined. Define the key for this EntityType. 
System.Data.Edm.EdmEntitySet: EntityType: EntitySet 'UserApplications' is based on type 'UserApplication' that has no keys defined. 

我可以然而使它工作使用这样

modelBuilder.Entity<UserApplication>().HasKey(obj => new {obj.UserId, obj.ApplicationId }); 

的流畅API怎么来EF不拿起我已经使用注释定义组合键？ 我敢肯定，这与使用旧的EF 4.1工作。

Answer 1

作品与实体框架6.1.3。我还添加了基本Application类，但所用的UserApplication的是（除了DatabaseGenerat 编选项生成该SQL：。

CREATE TABLE [dbo].[UserApplication] (
    [UserId] [int] NOT NULL, 
    [ApplicationId] [int] NOT NULL, 
    [SubscribedDate] [datetime] NOT NULL, 
    CONSTRAINT [PK_dbo.UserApplication] PRIMARY KEY ([UserId], [ApplicationId]) 
) 


CREATE TABLE [dbo].[Application] (
    [ApplicationId] [int] NOT NULL IDENTITY, 
    [Name] [nvarchar](max), 
    CONSTRAINT [PK_dbo.Application] PRIMARY KEY ([ApplicationId]) 
) 

Answer 2

我已经解决了问题，我刚刚加入额外的键列：？。

public class AlbumUser 
{ 
    public Album Album 
    { 
     get; 
     set; 
    } 

    public IdentityUser User 
    { 
     get; 
     set; 
    } 

    [Key] 
    [Column(Order = 0)] 
    [StringLength(128)] 
    public string UserId 
    { 
     get; 
     set; 
    } 

    [Key] 
    [Column(Order = 1)] 
    public int AlbumId 
    { 
     get; 
     set; 
    } 
}