Question

查看我的模特

    public class UsersContext : DbContext
        {
            public UsersContext()
                : base("DefaultConnection")
            {
            }

            public DbSet<UserProfile> UserProfiles { get; set; }
            public DbSet<Files> Files { get; set; }
        }

        [Table("UserProfile")]
        public class UserProfile
        {
            [Key]
            [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
            public int UserId { get; set; }
            public string UserName { get; set; }
        }

    [Table("Files")]
    public class Files
    {
        [Key]
        [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
        [Display(Name = "FileID")]
        public int FileID { get; set; }

        [Required]
        [ForeignKey("UserId")] // this is what I have tried
        [Display(Name = "For User")]
        public int UserId { get; set; }

        [Display(Name = "Description")]
        public string Desc { get; set; }

        [Required]
        [Display(Name = "Document Upload")]
        public string DocumentPath { get; set; }
    }

我想要的是在文件表中为用户ID定义外键。我应该如何做到这一点。我尝试使用[ForeignKey]属性。但它在PCM中执行update-database -verbose时给出了这个错误。

错误 - 导航属性“UserId”不是声明的属性输入'文件'。验证它是否未被明确排除模型，它是一个有效的导航属性。

Answer 1

Router.go('post_page', {_id: vai});

在EF 5中定义导航属性，代码优先迁移

1 个答案: