查詢elasticsearch文檔不顯示原始文檔

通過_source字段值爲false，查詢結果不顯示原始字段。

舉例：根據關係單號，查詢es，設置_source爲false

{
  "_source": false,
  "query": {
    "bool": {
      "must": [
        {
          "term": {
            "policyRelationNo": "KR01435021"
          }
        }
      ],
      "should": [],
      "must_not": []
    }
  },
  "from": 0,
  "size": 10
}

效果如下：

{
	"_shards": {
		"total": 5,
		"successful": 5,
		"failed": 0
	},
	"hits": {
		"total": 19,
		"max_score": 11.384308,
		"hits": [
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407038",
				"_score": 11.384308
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407056",
				"_score": 10.294733
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407052",
				"_score": 10.294733
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407062",
				"_score": 10.294733
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407064",
				"_score": 10.294733
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407054",
				"_score": 10.289511
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407068",
				"_score": 10.289511
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407042",
				"_score": 10.289511
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407050",
				"_score": 10.289511
			},
			{
				"_index": "search4policy-msad-dev3_20200520000000",
				"_type": "policy-msad-dev3",
				"_id": "4407044",
				"_score": 10.107844
			}
		]
	},
	"took": 4,
	"timed_out": false
}

優點：特殊場景下需要如此處理