Question

使用ASP.NET Web API 2 OData服务我公开了以下端点：

/entity1('key')/entity2('key')/entity3('key')/entity4('key')

当我执行/entity1('key')/entity2('key')/entity3?$expand=entity4时，我收到了正确 "@odata.context"的JSON回复：

"@odata.context": "https://host:port/$metadata#entity1('key')/entity2('ket')/entity3",
 "value": [
{
  ...,
  "entity4@odata.context": "https://host:port/$metadata#entity1('key')/entity2('key')/entity3('key')/entity4",
  "entity4": [
    {
      ...
    }
  ]
},
...

但是当我执行/entity1('key')/entity2('key')/entity3('key')?$expand=entity4时，我收到一个不正确的 "@odata.context"，其中包含两个键：

"@odata.context": "https://host:port/$metadata#entity1('key')/entity2('ket')/entity3",
 "value": [
{
  ...,
  "entity4@odata.context": "https://host:port/$metadata#entity1('key')/entity2('key')/entity3('key')('key')/entity4",
  "entity4": [
    {
      ...
    }
  ]
}

使用Microsoft的OData Client执行时会导致异常：

"The context URL 'https://host:port/$metadata#entity1('key')/entity2('key')/entity3('key')('key')/entity4' is invalid."

好吧不开玩笑。可能导致这种情况的原因是什么？

更新

我已经记录了问题here。我们会看到会发生什么。

Answer 1

我找到了解决方法：

使用$filter代替密钥：/entity1('key')/entity2('key')/entity3?$filter=Key eq 'key'&$expand=entity4提供正确的回复：

"@odata.context": "https://host:port/$metadata#entity1('key')/entity2('ket')/entity3",
"value": [
{
  ...,
  "entity4@odata.context": "https://host:port/$metadata#entity1('key')/entity2('key')/entity3('key')/entity4"    ,
  "entity4": [
    {
      ...
    }
  ]
}

OData $ expand包含不正确的上下文链接

1 个答案: