elasticsearch學習筆記高級篇（三）——在案例中實戰基於bool組合多個filter條件搜索

準備數據：

POST /forum/_bulk
{ "index": { "_id": 1 }}
{ "articleID" : "XHDK-A-1293-#fJ3", "userID" : 1, "hidden": false, "postDate": "2017-01-01" }
{ "index": { "_id": 2 }}
{ "articleID" : "KDKE-B-9947-#kL5", "userID" : 1, "hidden": false, "postDate": "2017-01-02" }
{ "index": { "_id": 3 }}
{ "articleID" : "JODL-X-1937-#pV7", "userID" : 2, "hidden": false, "postDate": "2017-01-01" }
{ "index": { "_id": 4 }}
{ "articleID" : "QQPX-R-3956-#aD8", "userID" : 2, "hidden": true, "postDate": "2017-01-02" }

需求

一、搜索發帖日期爲2017-01-01，或者帖子ID爲XHDK-A-1293-#fJ3的帖子，同時要求帖子的發帖日期不能爲2017-01-02

select * from forum
where (post_date = '2017-01-01' or article_id = 'XHDK-A-1293-#fJ3')
and post_date != '2017-01-02'

GET /forum/_search
{
  "query": {
    "constant_score": {
      "filter": {
        "bool": {
          "should": [
            {
              "term": {
                "postDate": "2017-01-01"
              }
            },
            {
              "term": {
                "articleID": "XHDK-A-1293-#fJ3"
              }
            }
          ],
          "must_not": [
            {
              "term": {
                "postDate": "2017-01-02"
              }
            }  
          ]
        }
      }
    }
  }
}

輸出：

{
  "took" : 55,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "forum",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "articleID" : "XHDK-A-1293-#fJ3",
          "userID" : 1,
          "hidden" : false,
          "postDate" : "2017-01-01"
        }
      },
      {
        "_index" : "forum",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.0,
        "_source" : {
          "articleID" : "JODL-X-1937-#pV7",
          "userID" : 2,
          "hidden" : false,
          "postDate" : "2017-01-01"
        }
      }
    ]
  }
}

must： 標識必須匹配
should: 能夠匹配其中一個便可
must_not: 必須不匹配

二、搜索帖子ID爲XHDK-A-1293-#fJ3， 或者是帖子ID爲JODL-X-1937-#pV7並且發帖日期爲2017-01-01的帖子

select * from forum
where article_id = 'XHDK-A-1293-#fJ3' or 
(article_id = 'JODL-X-1937-#pV7' and post_date = '2017-01-01')

GET /forum/_search
{
  "query": {
    "constant_score": {
      "filter": {
        "bool": {
          "should": [
            {
              "term": {
                "articleID": "XHDK-A-1293-#fJ3"
              }
            },
            {
              "bool": {
                "must": [
                  {
                    "term": {
                      "articleID": "JODL-X-1937-#pV7"
                    }
                  },
                  {
                    "term": {
                      "postDate": "2017-01-01"
                    }
                  }
                ]
              }
            }
          ]
        }
      }
    }
  }
}

輸出：

{
  "took" : 7,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "forum",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "articleID" : "XHDK-A-1293-#fJ3",
          "userID" : 1,
          "hidden" : false,
          "postDate" : "2017-01-01"
        }
      },
      {
        "_index" : "forum",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.0,
        "_source" : {
          "articleID" : "JODL-X-1937-#pV7",
          "userID" : 2,
          "hidden" : false,
          "postDate" : "2017-01-01"
        }
      }
    ]
  }
}