实体类型 MVC5 EF6 中的用户 [英] User in Entity type MVC5 EF6

问题描述

我在 MVC5 中创建了一个类，我想要内容的主要所有者，然后我想要一些内容编辑器:

I have created a class in MVC5, where I want a primary owner of the content and then I want to have some editors for the content:

public class Content
{
    public int ID { get; set; }
    public IdentityUser Owner { get; set; }
    public ICollection<IdentityUser> Editors { get; set; }
    public string Title{ get; set; }
    public string Body { get; set; }
}

在数据库上下文中，我有以下代码:

In the database context I have the following code:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);

    modelBuilder.Entity<Content>()
        .HasOptional(c => c.Editors)
        .WithRequired()
        .WillCascadeOnDelete();

    modelBuilder.Entity<Content>()
        .HasRequired(c => c.Owner)
        .WithOptional()
        .WillCascadeOnDelete();
}

我希望微软以这种方式实现 IdentityUser 对象，它可以在其他实体类型中使用，所以我可能做错了什么，因为当我尝试制作一个内容实体类型的控制器，我收到以下错误:

I would expect Microsoft to have implemented the IdentityUser object in such a way, that it can be used in other entity types, so I am probably doing something wrong, because when I try to make a controller for the Content entity type, I get the following error:

EntityType 'IdentityUserLogin' has no key defined
EntityType 'IdentityUserRole' has no key defined
EntityType: EntitySet 'IdentityUserLogins' is based on type 'IdentityUserLogin' that has no key defined
EntityType: EntitySet 'IdentityUserRoles' is based on type 'IdentityUserRole' that has no key defined

我还尝试将以下代码添加到 ApplicationDbContext 中，如本问题中所述在 asp.net MVC5 EF6 中使用 fluent api 映射表?:

I have also tried to add the following code to the ApplicationDbContext as described in this question Map tables using fluent api in asp.net MVC5 EF6?:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);
    modelBuilder.Entity<IdentityUserLogin>().HasKey<string>(l => l.UserId);
    modelBuilder.Entity<IdentityRole>().HasKey<string>(r => r.Id);
    modelBuilder.Entity<IdentityUserRole>().HasKey(r => new { r.RoleId, r.UserId });
}

我一定是做错了什么.请告诉我如何处理我的 Content EntityType 中的用户.

I must be doing something wrong. Please tell me how I can handle users in my Content EntityType.

推荐答案

以下方法 OnModelCreating 将创建一个工作上下文.不确定它是否是您想要的映射.

The following method, OnModelCreating, will create a working context. Not sure if it is the mapping you want though.

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);

    modelBuilder.Entity<Content>()
        .HasMany(c => c.Editors)
        .WithOptional()
        .WillCascadeOnDelete(false);

    modelBuilder.Entity<Content>()
        .HasRequired(c => c.Owner)
        .WithOptional()
        .WillCascadeOnDelete(false);

    modelBuilder.Entity<IdentityUserLogin>().HasKey<string>(l => l.UserId);
    modelBuilder.Entity<IdentityRole>().HasKey<string>(r => r.Id);
    modelBuilder.Entity<IdentityUserRole>().HasKey(r => new { r.RoleId, r.UserId });
}

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