无法使用Elasticsearch搜索父文档和子文档？

Question

I have indexed a child document in Elasticsearch as follows:

{
 _parent: chow-demo
 _index: prototype_2013.01.02
 _type: chow-clfg
 _id: l7jvEgD-SrG-Ws_9ab52IA
 _score: 11.600378
 _source: {
  chow-clfg: {
  @type: chow-clfg
  clfg: Cg5iUlAvU9IIAAAA8Rg
  @timestamp: 2013-01-02T10:15:00.000Z
  count: 1
  }
 }
}

The parent has at least 2 records that has clfg as a common identifier as follows:

{
 _index: "prototype_2013.01.02",
 _type: chow-demo, 
 clfg: Cg5iUlAvU9IIAAAA8Rg,
 obid: 97066795
}

However when I query using the "has_child" query, I get no results:

curl -XGET "localhost:9200:/prototype_2013.01.02/chow-demo/_search"
{
 "query": {
  "has_child": {
   "type": "chow-clfg",
   "query": {
    "term": {
      "clfg": "Cg5iUlAvU9IIAAAA8Rg"
    }
   }
  }
 }
}

However when I query individually for the documents, there were correct results returned. Why is that so? Isn't the parent routing supposed to be able to identify results using the child using the parent field?

Answer 1

为子级编制索引时，其“ _parent”字段应包含父级的ID（而不是父级的类型，因为您的情况似乎如此）。