Question

我有这个班......

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; }
}

另一类是这个......

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; }
}

我的数据访问是这个......

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>();
    }
}

当我尝试使用此数据访问和Post类创建控制器时出现此错误：

运行所选代码生成器时出错：'无法检索'LibraryBlog.Models.Post'的元数据。外键组件'CreatedId'不是'ApplicationUser'类型的声明属性。验证它尚未从模型中明确排除，并且它是一个有效的原始属性。'

Answer 1

我修正了这个错误。我修改了这个类，现在看起来像这样：

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; }
}

这一个：

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; } 
}

请您使用上面的代码编辑代码。希望这会有所帮助..

如何首先使用mvc 5和EntityFramework代码将两个属性映射到同一个表？

2 个答案: