Question

我已经阅读了十篇关于这个问题的帖子，但仍然无法理解我的失败原因：我被困在这两天以后。

ASPNET MVC5网络应用程序。代码优先

型号：

 public partial class Category
{
    public int ID { get; set; }
    public string Name { get; set; }
    public int? ParentID { get; set; }
    public bool IsDeleted { get; set; }
    public virtual ICollection<Product> Products { get; set; }
}

public class ISO_Languages
{
    public int ID { get; set; }
    public string code { get; set; }
    public bool IsEnabled { get; set; }
    public string name_en { get; set; }
    public string name_fr { get; set; }
    public string name_it { get; set; }
    public string name_de { get; set; }
    public string name_es { get; set; }
}

 public class CategoryTrans
{
    [Key]
    [Column(Order = 1)]
    public int category_id { get; set; }
    [Key]
    [Column(Order = 2)]
    public int language_id { get; set; }
    public string name { get; set; }
}

CategoryTrans具有基于两个FK的复合PK：类别ID和ISO_Languages ID

我只是想在CategoryTrans模型中正确引用这个架构，就像：

 public class CategoryTrans
{
    [Key, Column(Order = 1)]
    public int category_id { get; set; }
    [Key, Column(Order = 2)]
    public int language_id { get; set; }
    [ForeignKey("ID")]
    public virtual Category ID{ get; set; }
    [ForeignKey("ID")]
    public virtual ISO_Languages ID2{ get; set; }
    public string name { get; set; }

属性＆＃39; ID＆＃39;上的ForeignKeyAttribute在类型＆＃39; xyz.Models.CategoryTrans＆＃39;无效。外键名称＆＃39; ID＆＃39;在依赖类型＆＃39; xyz.Models.CategoryTrans＆＃39;中找不到。 Name值应为逗号分隔的外键属性名称列表

    public class CategoryTrans
   {
        [Key, Column(Order = 1)]
        public int category_id { get; set; }
        [Key, Column(Order = 2)]
        public int language_id { get; set; }
        [ForeignKey("Category")]
        public virtual Category catid{ get; set; }
        [ForeignKey("ISO_Languages")]
        public virtual ISO_Languages languguageid{ get; set; }
        public string name { get; set; }

属性＆＃39; catid＆＃39;上的ForeignKeyAttribute在类型＆＃39; xyz.Models.CategoryTrans＆＃39;无效。外键名称＆＃39;类别＆＃39;在依赖类型＆＃39; xyz.Models.CategoryTrans＆＃39;中找不到。 Name值应该是以逗号分隔的外键属性名称列表。

我想做一些不可能的事吗？

Answer 1

尝试：

 public partial class Category
{
    public int ID { get; set; }
    public string Name { get; set; }
    public int? ParentID { get; set; }
    public bool IsDeleted { get; set; }
    public virtual ICollection<Product> Products { get; set; }
    public virtual ICollection<CategoryTrans> CategoryTrans { get; set; }
}

public class ISO_Languages
{
    public int ID { get; set; }
    public string code { get; set; }
    public bool IsEnabled { get; set; }
    public string name_en { get; set; }
    public string name_fr { get; set; }
    public string name_it { get; set; }
    public string name_de { get; set; }
    public string name_es { get; set; }
    public virtual ICollection<CategoryTrans> CategoryTrans { get; set; }
}
 public class CategoryTrans
{
    [Key, Column(Order = 1)]
    public int category_id { get; set; }
    [Key, Column(Order = 2)]
    public int language_id { get; set; }
    [ForeignKey("category_id")]
    public virtual Category ID{ get; set; }
    [ForeignKey("language_id")]
    public virtual ISO_Languages ID2{ get; set; }
    public string name { get; set; }
}

复合PK模型类

1 个答案: