在 ASP.NET MVC 5 中使用 Entity Framework 代码优先添加涉及引用 ApplicationUser 的实体的迁移问题

Question

ASP.NET MVC 5，当涉及引用 ApplicationUser 实体的实体时，我在添加迁移时遇到了一些问题。我创建项目时使用的是个人账号认证

public class Blog
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid Id { get; set; }

    [ForeignKey("ApplicationUser")]
    public string ApplicationUserId { get; set; }

    public ApplicationUser ApplicationUser { get; set; }

    [Required]
    [StringLength(500, ErrorMessage = "The {0} must be at least {2} characters long.")]
    public string Content { get; set; }
}

public class ApplicationUser : IdentityUser
{
    public bool IsSoftDeleted { get; set; }

    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
    {
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        return userIdentity;
    }
}

我的 DBContexts 是

public class ApplicationUserDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationUserDbContext()
        : base("DefaultConnection", throwIfV1Schema: false)
    {
    }

    public static ApplicationUserDbContext Create()
    {
        return new ApplicationUserDbContext();
    }
}

public class BloggingServiceDbContext : DbContext
{
    public DbSet<Blog> Blogs { get; set; }

    public BloggingServiceDbContext() : base("DefaultConnection")
    {
    }
}

我在包管理控制台上运行的脚本是：

Add-Migration InitialBlogMigration -ConfigurationTypeName BloggerConfiguration

我得到的错误是：

BloggingService.Web.Context.IdentityUserLogin: : EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType.
BloggingService.Web.Context.IdentityUserRole: : EntityType 'IdentityUserRole' has no key defined. Define the key for this EntityType.
IdentityUserLogins: EntityType: EntitySet 'IdentityUserLogins' is based on type 'IdentityUserLogin' that has no keys defined.
IdentityUserRoles: EntityType: EntitySet 'IdentityUserRoles' is based on type 'IdentityUserRole' that has no keys defined.

注意：在实施 Blog 之前，运行ning add-migration 没有问题，并且数据库不包含错误消息中提到的任何实体。

我运行找不到可能是什么问题的线索。你能帮我找出问题所在吗？

Answer 1

解决方法似乎很简单，我需要将引用 ApplicationUser 的所有实体都放置到 ApplicationUserDbContext 中。但我仍然不知道为什么会这样，如果有人能为我澄清一下就好了。

在 ASP.NET MVC 5 中使用 Entity Framework 代码优先添加涉及引用 ApplicationUser 的实体的迁移问题

Issue adding migration involving entity that reference ApplicationUser in ASP.NET MVC 5 with Entity Framework code-first

asp.net-mvc

data-migration

entity-framework

dbcontext