Elasticsearch curl查询组合了嵌套、exists和not exists查询

curl -XGET 'http://localhost:9200/index/_search' -d '{
  "query": {
    "bool": {
      "must": [
        {
          "nested": {
            "path": "nested_field",
            "query": {
              "bool": {
                "must": [
                  {
                    "term": {
                      "nested_field.field1": "value1"
                    }
                  },
                  {
                    "exists": {
                      "field": "nested_field.field2"
                    }
                  },
                  {
                    "bool": {
                      "must_not": [
                        {
                          "exists": {
                            "field": "nested_field.field3"
                          }
                        }
                      ]
                    }
                  }
                ]
              }
            }
          }
        }
      ]
    }
  }
}'