代码优先和EF 5.0不加载导航属性 [英] Code First and EF 5.0 not loading navigation properties

问题描述

我想通过代码优先和EF 5.0的子对象加载为空加载导航属性。下面是代码。

I am trying to load a navigation property through Code First and EF 5.0 The child object is loading as null. below is the code.

  [Table("ls_roles")]
    public class Role
    {
        [Required]
        [Key]
        public int RoleID { get; set; }

        [Required]
        public String BarColor { get; set; }

        [ForeignKey("RoleId")]
        public virtual ICollection<ScheduleEmployee> Employees { get; set; }
    }

    [Table("ls_ScheduleEmployee")]
    public class ScheduleEmployee
    {
        [Key]
        [Required]
        public int Id { get; set; }

        [Required]
        public int RoleId { get; set; }

        [ForeignKey("RoleId")]
        public  Role Role { get; set; }
    }

编辑：调用代码

CALLING CODE

class Program
{
    static void Main(string[] args)
    {
        var x = new Model.ContextEntityFramework().ScheduleEmployees.FirstOrDefault();
    }
}

x.Role == NULL在这一点

x.Role == null at this point

推荐答案

您必须做你的调用代码，包括儿童.INCLUDE。

You have to do a .include on your calling code to include children.

像

Model.ContextEntityFramework().ScheduleEmployees.Include(x => x.Role).FirstOrDefault();

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