搜索查询以在禁用 _source 的情况下在 elasticsearch 中检索嵌套文档

Question

我有以下映射

{
    "cloth": {
                 "dynamic" : false,
                 "_source" : {"enabled" : false },
        "properties": {
            "name": {
                "type": "string",
                "index": "analyzed"
            },
            "variation": {
                "type": "nested",
                "properties": {
                    "size": {
                        "type": "string",
                        "index": "not_analyzed"
                    },
                    "color": {
                        "type": "string",
                        "index": "not_analyzed"
                    }
                }
            }
        }
    }
}

我无法找到使用字段查询检索嵌套对象字段的方法。

{
    "fields" : ["name" , "variation.size", "variation.color"],
    "query" : {
        "nested" : {
            "path" : "variation",
            "query" : {
                "bool" : {
                    "must" : [
                        { "term" : { "variation.size" : "XXL" } },
                        { "term" : { "variation.color" : "red" } }
                        ]
                }
            }
        }
    }
}

上面的查询返回

"_id" : "1",
  "_score" : 1.987628,
  "fields" : {
    "variation.size" : [ "XXL", "XL" ],
    "variation.color" : [ "red", "black" ],
    "name" : [ "Test shirt" ]
  }

当我尝试过

"fields" : ["name" , "variation"]

我得到了错误

status: 400

reason: "ElasticsearchIllegalArgumentException[field [variation] isn't a leaf field]"

这是预期的。

我怎样才能按原样获得变体对象？

预期结果。我需要检索整个变量对象，以便我可以保留大小和颜色的关联。就像“红色”和“XXL”一样。

"variation" : { "XXL" , "red"}

更新:此索引类型的来源已禁用。

Answer 1

如果您使用 Source Filtering它将作为一个整体返回嵌套对象，您的查询将是:

{
  "_source": [
    "name",
    "variation"
  ],
  "query": {
    "nested": {
      "path": "variation",
      "query": {
        "bool": {
          "must": [
            {
              "term": {
                "variation.size": "XXL"
              }
            },
            {
              "term": {
                "variation.color": "red"
              }
            }
          ]
        }
      }
    }
  }
}