es - elasticsearch mapping - parameters - 2

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 ：boost有什么特点？
答 ：

问 ：boost如何使用？
答 ：

# boost
PUT /boost_test
{
  "mappings" : {
    "properties" : {
      "title"   : {"type" : "text"},
      "content" : {"type" : "text"}
    }
  }
}

# 索引
POST /boost_test/_doc/1
{
  "title"   : "hello good me",
  "content" : "hello good me"
}

POST /boost_test/_doc/2
{
  "title"   : "good hello",
  "content" : "this is a good me" 
}

POST /boost_test/_doc/3
{
  "title"   : "good me",
  "content" : "hello good me"
}

POST /boost_test/_doc/4
{
  "title"   : "hello me",
  "content" : "hello good me"
}

# 搜索
GET /boost_test/_search
{
  "query" : {
    "bool": {
      "should" : [
        {
          "match" : {
            "title": {
                "query" : "good",
                "boost" : 2
            }
          }
        },
        {
          "match": {
            "content" : {
              "query" : "hello",
              "boost" : 1
            }
          }
        }
      ]
    }
  }
}

# 结果
{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : 1.1261322,
    "hits" : [
      {
        "_index" : "boost_test",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.1261322,
        "_source" : {
          "title" : "good me",
          "content" : "hello good me"
        }
      },
      {
        "_index" : "boost_test",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0065613,
        "_source" : {
          "title" : "hello good me",
          "content" : "hello good me"
        }
      },
      {
        "_index" : "boost_test",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 0.7473189,
        "_source" : {
          "title" : "good hello",
          "content" : "this is a good me"
        }
      },
      {
        "_index" : "boost_test",
        "_type" : "_doc",
        "_id" : "4",
        "_score" : 0.3788134,
        "_source" : {
          "title" : "hello me",
          "content" : "hello good me"
        }
      }
    ]
  }
}

# 搜索
GET /boost_test/_search
{
  "query" : {
    "bool": {
      "should" : [
        {
          "match" : {
            "title": {
                "query" : "good",
                "boost" : 1
            }
          }
        },
        {
          "match": {
            "content" : {
              "query" : "hello",
              "boost" : 2
            }
          }
        }
      ]
    }
  }
}

# 结果
{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : 1.1312863,
    "hits" : [
      {
        "_index" : "boost_test",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.1312863,
        "_source" : {
          "title" : "good me",
          "content" : "hello good me"
        }
      },
      {
        "_index" : "boost_test",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0715008,
        "_source" : {
          "title" : "hello good me",
          "content" : "hello good me"
        }
      },
      {
        "_index" : "boost_test",
        "_type" : "_doc",
        "_id" : "4",
        "_score" : 0.7576268,
        "_source" : {
          "title" : "hello me",
          "content" : "hello good me"
        }
      },
      {
        "_index" : "boost_test",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 0.37365946,
        "_source" : {
          "title" : "good hello",
          "content" : "this is a good me"
        }
      }
    ]
  }
}