es - elasticsearch mapping - field data type - 6

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 ：field的对象和关系类型有哪些？
答 ：object flattened nested join

问 : object 如何使用？
答 ：

# object
# 配置项 :
#   1. dynamic    : properties是否可以动态添加，默认true，选项 : true false strict
#   2. enabled    : 是否分析和索引，默认true
#   3. properties : 指定对象的内部field

PUT /object_test
{
  "mappings" : {
    "properties" : {
      "area" : {"type" : "keyword"},
      "user" : {
        "properties" : { 
          "age"  : {"type" : "integer"},
          "name" : {
            "properties" : {
              "first" : {"type" : "keyword"},
              "last"  : {"type" : "keyword"}
            }
          }
        }
      }
    }
  }
}

GET /object_test/_mapping

# 结果
{
  "object_test" : {
    "mappings" : {
      "properties" : {
        "area" : {
          "type" : "keyword"
        },
        "user" : {
          "properties" : {
            "age" : {
              "type" : "integer"
            },
            "name" : {
              "properties" : {
                "first" : {
                  "type" : "keyword"
                },
                "last" : {
                  "type" : "keyword"
                }
              }
            }
          }
        }
      }
    }
  }
}


POST /object_test/_doc
{
  "area" : "China",
  "user" : {
    "age"  : 13,
    "name" : {
      "first" : "hello",
      "last"  : "good"
    }
  }
}

GET /object_test/_search

# 结果
{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "object_test",
        "_type" : "_doc",
        "_id" : "4Gvw23cBnJvha9PM8oxL",
        "_score" : 1.0,
        "_source" : {
          "area" : "China",
          "user" : {
            "age" : 13,
            "name" : {
              "first" : "hello",
              "last" : "good"
            }
          }
        }
      }
    ]
  }
}