嵌套类别的父/子映射

Question

我正在尝试使用嵌套类别创建子/父映射，但是smohow结果令人困惑

首先我创建了一个索引

PUT /categories/ {}

然后映射

/categories/category/_mappings
{

  "_parent": {"type": "category"}
 }

索引

PUT /categories/category/1?parent=0
{
   "name": "Grandparent"

},
PUT /categories/category/2?parent=0
{
   "name": "Grandmother"

}

PUT /categories/category/3?parent=1
{
   "name": "father"

},
PUT /categories/category/4?parent=1
{
   "name": "mother"

}

我希望流畅的搜索会让我回归“祖父母”类别，但它会让我回归零点

GET /categories/category/_search
{
"query": {
   "has_child": {
      "type": "category",
      "query" : {
        "filtered": {
          "query": { "match_all": {}}

        }
      }
    }
  }
}