定制dynamic策略

true：遇到陌生字段，就进行dynamic mapping false：遇到陌生字段，就忽略 strict：遇到陌生字段，就报错


PUT /my_index
{
    "mappings":{
        "my_type":{
            "dynamic":"strict",
            "properties":{
                "title":{
                    "type":"text"
                },
                "address":{
                    "type":"object",
                    "dynamic":"true"
                }
            }
        }
    }
}


PUT /my_index/my_type/1
{
	"title": "my article",
	"content": "this is my article",
	"address": {
			"province": "guangdong",
			"city": "guangzhou"
	}
}


{
"error": {
"root_cause": [
{
"type": "strict_dynamic_mapping_exception",
"reason": "mapping set to strict, dynamic introduction of [content] within [my_type] is not allowed"
}
],
"type": "strict_dynamic_mapping_exception",
"reason": "mapping set to strict, dynamic introduction of [content] within [my_type] is not allowed"
},
"status": 400
}


PUT /my_index/my_type/1
{
		"title": "my article",
		"address": {
				"province": "guangdong",
				"city": "guangzhou"
		}
}


GET /my_index/_mapping/my_type
{
    "my_index":{
        "mappings":{
            "my_type":{
                "dynamic":"strict",
                "properties":{
                    "address":{
                        "dynamic":"true",
                        "properties":{
                            "city":{
                                "type":"text",
                                "fields":{
                                    "keyword":{
                                        "type":"keyword",
                                        "ignore_above":256
                                    }
                                }
                            },
                            "province":{
                                "type":"text",
                                "fields":{
                                    "keyword":{
                                        "type":"keyword",
                                        "ignore_above":256
                                    }
                                }
                            }
                        }
                    },
                    "title":{
                        "type":"text"
                    }
                }
            }
        }
    }
}

定制dynamic mapping策略

date_detection

默认会按照一定格式识别date，比如yyyy-MM-dd。但是如果某个field先过来一个2017-01-01的值，就会被自动dynamic mapping成date，后面如果再来一个"hello world"之类的值，就会报错。可以手动关闭某个type的date_detection，如果有需要，自己手动指定某个field为date类型。


PUT /my_index/_mapping/my_type
{
		"date_detection": false
}

定制自己的dynamic mapping template（type level）


PUT /my_index
{
    "mappings":{
        "my_type":{
            "dynamic_templates":[
                {
                    "en":{
                        "match":"*_en",
                        "match_mapping_type":"string",
                        "mapping":{
                            "type":"string",
                            "analyzer":"english"
                        }
                    }
                }
            ]
        }
    }
}


PUT /my_index/my_type/1
{
		"title": "this is my first article"
}


PUT /my_index/my_type/2
{
		"title_en": "this is my first article"
}

title没有匹配到任何的dynamic模板，默认就是standard分词器，不会过滤停用词，is会进入倒排索引，用is来搜索是可以搜索到的 title_en匹配到了dynamic模板，就是english分词器，会过滤停用词，is这种停用词就会被过滤掉，用is来搜索就搜索不到了

定制自己的default mapping template（index level）


PUT /my_index
{
    "mappings":{
        "default":{
            "_all":{
                "enabled":false
            }
        },
        "blog":{
            "_all":{
                "enabled":true
            }
        }
    }
}