我试图在实体框架代码优先模型中表示带有类型边的图。我很难理解如何正确建立关系。我正在调用图表'Items'中的节点和边缘'Relationships'这就是我所拥有的:
public class Item : Learnable
{
public Boolean IsBeginningItem { get; set; }
public virtual List<Relationship> RelationshipsLeft { get; set; }
public virtual List<Relationship> RelationshipsRight { get; set; }
}
-
public class Relationship : Learnable
{
public Boolean IsPrerequisiteRelationship { get; set; }
public virtual RelationshipType RelationshipType { get; set; }
public int ItemLeftID { get; set; }
[ForeignKey("ItemLeftID")]
public virtual Item ItemLeft { get; set; }
public int ItemRightID { get; set; }
[ForeignKey("ItemRightID")]
public virtual Item ItemRight { get; set; }
}
这就是我得到的:
如何让Item的RelationshipsRight属性对应于Relationship的ItemLeft属性和Item的RelationshipsLeft属性对应于Relationship的ItemRight属性?
哦......我想我应该解释一下这应该是一个可以双向导航的有向图。 :)
答案 0 :(得分:0)
您可以使用[InverseProperty]
属性将正确的导航属性对绑定在一起:
public class Relationship
{
//...
public int ItemLeftID { get; set; }
[ForeignKey("ItemLeftID"), InverseProperty("RelationshipsRight")]
public virtual Item ItemLeft { get; set; }
public int ItemRightID { get; set; }
[ForeignKey("ItemRightID"), InverseProperty("RelationshipsLeft")]
public virtual Item ItemRight { get; set; }
}