es - elasticsearch mapping - field data type - 17

世界上并没有完美的程序，但是我们并不因此而沮丧，因为写程序就是一个不断追求完美的过程。

问 ：completion的特点是什么？
答 ：

问 ：completion如何使用？
答 ：

# completion
PUT /completion_test
{
  "mappings" : {
    "properties" : {
      "my_suggest" : {
        "type"     : "completion",
        "analyzer" : "standard"
      }
    }
  }
}

# 索引
POST /completion_test/_doc
{
  "my_suggest" : { 
      "input"  : "hello",
      "weight" : 10
  }
}

POST /completion_test/_doc
{
  "my_suggest" : { 
      "input"  : "good",
      "weight" : 10
  }
}

POST /completion_test/_doc
{
  "my_suggest" : { 
      "input"  : "heme",
      "weight" : 10
  }
}

POST /completion_test/_doc
{
  "my_suggest" : {
    "input"  : "heck", 
    "weight" : 30
  }
}

# suggest
GET /completion_test/_search?pretty
{
  "suggest" : {
    "my_suggest_realtime" : {
      "prefix"  : "he",
      "completion" : {
        "field" : "my_suggest",
        "size"  : 2
      }
    }
  }
}

# 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" : {
    "my_suggest_realtime" : [
      {
        "text" : "he",
        "offset" : 0,
        "length" : 2,
        "options" : [
          {
            "text" : "heck",
            "_index" : "completion_test",
            "_type" : "_doc",
            "_id" : "OaYfQ3gBgXknW_r_aXUB",
            "_score" : 30.0,
            "_source" : {
              "my_suggest" : {
                "input" : "heck",
                "weight" : 30
              }
            }
          },
          {
            "text" : "hello",
            "_index" : "completion_test",
            "_type" : "_doc",
            "_id" : "NqYfQ3gBgXknW_r_RnVP",
            "_score" : 10.0,
            "_source" : {
              "my_suggest" : {
                "input" : "hello",
                "weight" : 10
              }
            }
          }
        ]
      }
    ]
  }
}