我有一张桌子,其中有一个"自我引用关系" - One Wall评论可能是其他人的孩子。这是我的数据模型:
public class UserWall
{
[Key]
public int WId { get; set; }
public Guid UserId { get; set; }
public string WContent { get; set; }
public Guid? WriterId { get; set; }
[DataType(DataType.DateTime)]
public DateTime WTime { get; set; }
public int? ParentWId { get; set; }
public virtual UserWall Parent { get; set; }
public virtual ICollection<UserWall> Children { get; set; }
}
所以,有了这个URI /MyService.svc/UserWalls(1)/ ,我得到了:
<?xml version="1.0" encoding="utf-8"?>
<entry xml:base="http://localhost:1636/CoreService.svc/" xmlns="http://www.w3.org/2005/Atom" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns:georss="http://www.georss.org/georss" xmlns:gml="http://www.opengis.net/gml">
<id>http://localhost:1636/CoreService.svc/UserWalls(1)</id>
<category term="ESN.Models.UserWall" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" />
<link rel="edit" title="UserWall" href="UserWalls(1)" />
<link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Parent" type="application/atom+xml;type=entry" title="Parent" href="UserWalls(1)/Parent" />
<link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Children" type="application/atom+xml;type=feed" title="Children" href="UserWalls(1)/Children" />
<title />
<updated>2012-02-15T04:07:39Z</updated>
<author>
<name />
</author>
<content type="application/xml">
<m:properties>
<d:WId m:type="Edm.Int32">1</d:WId>
<d:UserId m:type="Edm.Guid">e735311a-55fd-48cb-bac0-3441ae99ebea</d:UserId>
<d:WContent>cức</d:WContent>
<d:WriterId m:type="Edm.Guid">e735311a-55fd-48cb-bac0-3441ae99ebea</d:WriterId>
<d:WTime m:type="Edm.DateTime">2012-02-15T01:01:00</d:WTime>
<d:ParentWId m:type="Edm.Int32" m:null="true" />
</m:properties>
</content>
</entry>
使用URI /MyService.svc/UserWalls(1)/ Children ,我可以得到他们的孩子。
但是,无论如何我可以在没有额外请求的情况下加载子数据吗?
答案 0 :(得分:2)
是的,您应该可以使用$ expand关键字。 例如:/MyService.svc/UserWalls(1)?$ expand =儿童