如何首先使用mvc 5和EntityFramework代碼將兩個屬性映射到同一張表？

Question

我上這堂課。

public class ApplicationUser : IdentityUser
{
    [Required]
    [DataType(DataType.EmailAddress)]
    public string Email { get; set; }

    public virtual ICollection<Post> PostsCreated { get; set; }
    public virtual ICollection<Post> PostsModified { get; set; }
    public virtual Comment Comment { get; set; }
}

而另一類是...

public class Post
{
    public int PostId { get; set; }
    public string Title { get; set; }
    public string Body { get; set; }
    public virtual ICollection<Category> Category { get; set; }

    public DateTime PublishDate { get; set; }
    public DateTime CreateDate { get; set; }
    //----------------------------------------------------------------
    [ForeignKey("UserCreated"), Column(Order = 0)]
    public string CreatedId { get; set; }

    [ForeignKey("UserModify"), Column(Order = 1)]
    public string ModifiedId { get; set; }
    //----------------------------------------------------------------
    [InverseProperty("PostsCreated")]
    public virtual ICollection<ApplicationUser> UserCreated { get; set; }

    [InverseProperty("PostsModified")]
    public virtual ICollection<ApplicationUser> UserModify { get; set; }
    //----------------------------------------------------------------
    public DateTime ModifiedDate { get; set; }
    public Public Public { get; set; }
}

我的數據訪問權限是這個.....

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
        : base("BlogLibrary2")
    {
    }
    public DbSet<Post> Post { get; set; }
    public DbSet<Comment> Comment { get; set; }
    public DbSet<Category> Category { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        modelBuilder.Conventions.Remove<ManyToManyCascadeDeleteConvention>();
        modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
    }
}

當我嘗試使用此數據訪問和Post類創建控制器時，出現了此錯誤：

運行所選代碼生成器時發生錯誤：“無法檢索'LibraryBlog.Models.Post”的元數據。 外鍵組件'CreatedId'不是類型為'ApplicationUser'的已聲明屬性。請驗證它尚未從模型中明確排除，並且它是有效的原始屬性。

Answer 1

我修復了該錯誤。 我修改了此類，現在看起來像這樣：

public class ApplicationUser : IdentityUser
{
     [Required]
     [DataType(DataType.EmailAddress)]
     public string Email { get; set; }
     public virtual ICollection<Post> PostsCreated { get; set; }
     public virtual ICollection<Post> PostsModified { get; set; }
     public virtual Comment Comment { get; set; }
}

還有這個：

public class Post
{
     public int PostId { get; set; }
     public string Title { get; set; }
     public string Body { get; set; }
     public virtual ICollection<Category> Category { get; set; }

     public DateTime PublishDate { get; set; }
     public DateTime CreateDate { get; set; }
     //---------------------Here is the point
     public string PostCreatedBy { get; set; }
     public string PostModifiedBy { get; set; }
     [ForeignKey("PostCreatedBy"), InverseProperty("PostsCreated")]
     public virtual ApplicationUser CreatedBy { get; set; }
     [ForeignKey("PostModifiedBy"), InverseProperty("PostsModified")]
     public virtual ApplicationUser ModifiedBy { get; set; }
     //-------------------------------------------
     public DateTime ModifiedDate { get; set; }
     public Public Public { get; set; }
}

Answer 2

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
    : base("BlogLibrary2")
    {
    }
        public DbSet<Post> posts { get; set; }
        public DbSet<Comment> comments { get; set; }
        public DbSet<Category> categories { get; set; } 
}

請用上面的代碼編輯一下代碼。 希望這可以幫助..