Elasticsearch

Question

我正在使用 Elasticsearch RC 2.0.0。

我的 Elasticsearch 数据库中有一些父子关系。我想检索与父对象相关的所有子对象。我总是收到一个空的结果列表。我按照 elasticsearch 文档的说明进行操作，并将我的代码与几本书进行了比较。我不明白，为什么我的查询应该 return 一个空结果。

在这种情况下，我构建了一个简化的示例。我把两个对象放到elasticsearch中，把对象a设置为对象b的父对象。然后我尝试检索所有对象，其父类型为 a.

这是我的输入：

PUT test

PUT test/myobject/_mapping
    {
        "myobject":{
        "_parent" : {"type":"pobject"},
        "properties" : {
         "name" : {"type":"string"}   
        }

        }
    }

    PUT test/pobject/_mapping
    {
        "pobject" : {
            "properties": {
                "name": {"type":"string"}
            }

        }

    }

    PUT test/pobject/1
    {
        "name":"theParent"
    }

    PUT test/myobject/1?_parent=1&routing=_id
    {
        "name":"theChild"
    }

    POST test/myobject/_search?routing=_id
    {
         "query":{
            "has_parent":{
                 "type":"pobject",
            "query":{
                "match_all":{}
            }
            }
        }


    }

这将return

{
   "took": 2,
   "timed_out": false,
   "_shards": {
      "total": 1,
      "successful": 1,
      "failed": 0
   },
   "hits": {
      "total": 0,
      "max_score": null,
      "hits": []
   }
}

Answer 1

错误在这里：PUT test/myobject/1?_parent=1&routing=_id

参数是parent，不是_parent。

POST test/myobject/1?parent=1
{
  "name": "theChild"
}

此外，您不需要使用 routing=_id。见 documentation.

要测试的命令的完整列表：

DELETE test
PUT test

PUT test/myobject/_mapping
{
  "myobject": {
    "_parent": {
      "type": "pobject"
    },
    "properties": {
      "name": {
        "type": "string"
      }
    }
  }
}

PUT test/pobject/_mapping
{
  "pobject": {
    "properties": {
      "name": {
        "type": "string"
      }
    }
  }
}

POST test/pobject/1
{
  "name": "theParent"
}

POST test/myobject/1?parent=1
{
  "name": "theChild"
}

POST test/myobject/_search
{
  "query": {
    "has_parent": {
      "parent_type": "pobject",
      "query": {
        "match_all": {}
      }
    }
  }
}

Elasticsearch - Has_Parent 或 Has_Child 查询返回空结果

Elasticsearch - Has_Parent or Has_Child query returning empty results

elasticsearch-2.0