EF 4.1 EntityType没有键 - 复合

Question

我刚刚使用NuGet升级到最新的EF 4.1代码,现在我收到有关映射的错误.

我有这门课

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; }
}

我收到这个错误:

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.

但是,我可以使用像这样的Fluent API

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

为什么EF没有拿起我使用注释定义的复合键？我很确定这曾经适用于较旧的EF 4.1.

Answer 1

适用于实体框架 6.1.3。我还添加了一个基本Application类，但按UserApplication原样使用（除了 DatabaseGenerat选项。生成了此 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])
)