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测试数据：

POST /forum/article/_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" }POST /forum/article/_bulk{ "update": { "_id": "1"} }{ "doc" : {
  "tag" : ["java", "hadoop"]} }{ "update": { "_id": "2"} }{ "doc" : {
  "tag" : ["java"]} }{ "update": { "_id": "3"} }{ "doc" : {
  "tag" : ["hadoop"]} }{ "update": { "_id": "4"} }{ "doc" : {
  "tag" : ["java", "elasticsearch"]} }

• 搜索articleID=KDKE-B-9947-#kL5或者QQPX-R-3956-#aD8的doc

GET /forum/article/_search{ "query": {   "constant_score": {     "filter": {       "terms": {         "articleID": [           "KDKE-B-9947-#kL5",           "QQPX-R-3956-#aD8"         ]       }     }   } }}

• 搜索tags中有java的帖子

GET /forum/article/_search{  "query": {    "constant_score": {      "filter": {        "terms": {          "tag": ["java"]        }      }    }  }}

• 对搜索到的结果进行优化，只想搜索到tag中只有java的doc：

POST /forum/article/_bulk{ "update": { "_id": "1"} }{ "doc" : {"tag_cnt" : 2} }{ "update": { "_id": "2"} }{ "doc" : {"tag_cnt" : 1} }{ "update": { "_id": "3"} }{ "doc" : {"tag_cnt" : 1} }{ "update": { "_id": "4"} }{ "doc" : {"tag_cnt" : 2} }

添加一个字段表示tag中的数量

GET /forum/article/_search{  "query": {    "constant_score": {      "filter": {        "bool": {          "must": [            {              "terms": {                "tag": ["java"]              }            },            {              "term": {                "tag_cnt": 1              }            }          ]        }      }    }  }}

就可以查询出我们想要的结果

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