es - elasticsearch mapping - field data type - 23

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 ：rank_features有什么特点？
答 ：

问 ：rank_features如何使用？
答 ：

# rank_features
PUT /rank_features_test
{
  "mappings" : {
    "properties" : {
      "my_rank_features" : {"type" : "rank_features"}
    }
  }
}

# 索引
POST /rank_features_test/_doc
{
  "my_rank_features" : {
    "politics"  : 10,
    "economics" : 20.3
  }
}

# 索引
POST /rank_features_test/_doc
{
  "my_rank_features" : {
    "politics" : 21,
    "sports"   : 38
  }
}

# 搜索
GET /rank_features_test/_search
{
  "query" : {
    "rank_feature" : {
      "field" : "my_rank_features.politics"
    }
  }
}

# 结果
{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 0.59574467,
    "hits" : [
      {
        "_index" : "rank_features_test",
        "_type" : "_doc",
        "_id" : "UGeRe3gBVbS9eSDZ1u6Y",
        "_score" : 0.59574467,
        "_source" : {
          "my_rank_features" : {
            "politics" : 21,
            "sports" : 38
          }
        }
      },
      {
        "_index" : "rank_features_test",
        "_type" : "_doc",
        "_id" : "T2eQe3gBVbS9eSDZu-70",
        "_score" : 0.41237116,
        "_source" : {
          "my_rank_features" : {
            "politics" : 10,
            "economics" : 20.3
          }
        }
      }
    ]
  }
}