entity-framework - 具有导航属性的 EF-Code 第一个复杂类型

Question

我的型号:

public class Country
{
    public int CountryId { get; set; }
    public string Name { get; set; }

    public virtual ICollection<User> Users { get; set; }
}

public class Location
{
    public string Address { get; set; }

    public virtual int CountryId { get; set; }
    public virtual Country Country { get; set; }
}    

public class User{

    protected User()
    {
        Location = new Location();
    }

    public int UserId { get; set; }
    public Location Location { get; set; }

}

生成数据库时，我得到:

One or more validation errors were detected during model generation:

System.Data.Edm.EdmEntityType: : EntityType 'Location' has no key defined. Define the key for this EntityType.
System.Data.Edm.EdmEntitySet: EntityType: EntitySet �Locations� is based on type �Location� that has no keys defined.

如何在复杂类型中拥有导航属性？如果我删除国家导航属性，它工作正常。

Answer 1

不支持复杂类型的导航属性(引用其他实体)。您必须制作您的 Location实体(带有自己的表)或删除导航属性 Country来自 Location (并添加 Steve Morgan 提到的 [ComplexType] 属性)。

编辑

引用:http://msdn.microsoft.com/en-us/library/bb738472.aspx

"Complex type cannot contain navigation properties."