Elastic search 的 completion 搜索提示和模糊查询

想要使用 Elastic search 工具来实现搜索框的提示功能，可以按照本文的步骤来进行设置。

1. 安装好 jieba 插件，如果有 ik 也可，但是相应的下面的 analyzer 作出相应的改变即可。

2. 定义 mapping

     PUT games
     {
       "mappings": {
           "properties" : {
             "title" : {
               "type": "completion"
             }
           }
       }
     }
   

3. 增加数据

     PUT /games/_doc/1
     {
       "title": "Nevermind"
     }
     PUT /games/_doc/2
     {
       "title": "Nirvana"
     }
   

4. 查找

     POST games/_search?pretty
    {
        "suggest": {
            "song-suggest" : {
                "prefix" : "nor",
                "completion" : {
                    "field" : "title",
                    "fuzzy" : {
                        "fuzziness" : 2
                    }
                }
            }
        }
    }
   

5. 结果

    {
      "took" : 0,
      "timed_out" : false,
      "_shards" : {
        "total" : 1,
        "successful" : 1,
        "skipped" : 0,
        "failed" : 0
      },
      "hits" : {
        "total" : {
          "value" : 0,
          "relation" : "eq"
        },
        "max_score" : null,
        "hits" : [ ]
      },
      "suggest" : {
        "song-suggest" : [
          {
            "text" : "nor",
            "offset" : 0,
            "length" : 3,
            "options" : [
              {
                "text" : "Nevermind",
                "_index" : "games",
                "_type" : "_doc",
                "_id" : "1",
                "_score" : 1.0,
                "_source" : {
                  "title" : "Nevermind"
                }
              },
              {
                "text" : "Nirvana",
                "_index" : "games",
                "_type" : "_doc",
                "_id" : "2",
                "_score" : 1.0,
                "_source" : {
                  "title" : "Nirvana"
                }
              }
            ]
          }
        ]
      }
    }