Elasticsearch6.x 变化

1 string类型去除

url: /test1
method: PUT
params : {
  "mappings": {
    "type1": {
      "properties": {
        "user": {
          "type": "string"
         
        }
      }
    }
  }
}

报错如下

{
    "error": {
        "root_cause": [{
            "type": "mapper_parsing_exception",
            "reason": "No handler for type [string] declared on field [user]"
        }],
        "type": "mapper_parsing_exception",
        "reason": "Failed to parse mapping [type1]: No handler for type [string] declared on field [user]",
        "caused_by": {
            "type": "mapper_parsing_exception",
            "reason": "No handler for type [string] declared on field [user]"
        }
    },
    "status": 400
}

解决: string替换为text或者keyword

url: /test1
method: PUT
params : {
  "mappings": {
    "type1": {
      "properties": {
        "user": {
          "type": "text",
        }
      }
    }
  }
}

 

（1）string
string类型在ElasticSearch 旧版本中使用较多，从ElasticSearch 5.x开始不再支持string，由text和keyword类型替代。
（2）text
当一个字段是要被全文搜索的，比如Email内容、产品描述，应该使用text类型。设置text类型以后，字段内容会被分析，在生成倒排索引以前，字符串会被分析器分成一个一个词项。text类型的字段不用于排序，很少用于聚合。
（3）keyword
keyword类型适用于索引结构化的字段，比如email地址、主机名、状态码和标签。如果字段需要进行过滤(比如查找已发布博客中status属性为published的文章)、排序、聚合。keyword类型的字段只能通过精确值搜索到。

2 index类型为bool

url: /test1
method: PUT
params : {
  "mappings": {
    "type1": {
      "properties": {
        "user": {
          "type": "text",
          "index": "not_analyzed"
        }
      }
    }
  }
}

报错如下

 

{
    "error": {
        "root_cause": [{
            "type": "mapper_parsing_exception",
            "reason": "Failed to parse mapping [type1]: Could not convert [user.index] to boolean"
        }],
        "type": "mapper_parsing_exception",
        "reason": "Failed to parse mapping [type1]: Could not convert [user.index] to boolean",
        "caused_by": {
            "type": "illegal_argument_exception",
            "reason": "Could not convert [user.index] to boolean",
            "caused_by": {
                "type": "illegal_argument_exception",
                "reason": "Failed to parse value [not_analyzed] as only [true] or [false] are allowed."
            }
        }
    },
    "status": 400
}

解决: "index": "not_analyzed" 替换为 "index": true | false

url: /test1
method: PUT
params : {
  "mappings": {
    "type1": {
      "properties": {
        "user": {
          "type": "text",
          "index": false
        }
      }
    }
  }
}

mapping parameters中的index只能接收一个bool值，true或者false

 

3 自定义分析器参数错误

# POST
url: /_analyze/
method: POST
params : {
  "tokenizer": "keyword",
  "token_filters": [
    "lowercase"
  ],
  "char_filters": [
    "html_strip"
  ],
  "text": "this is a test"
}

报错如下

{
    "error": {
        "root_cause": [{
            "type": "illegal_argument_exception",
            "reason": "Unknown parameter [token_filters] in request body or parameter is of the wrong type[START_ARRAY] "
        }],
        "type": "illegal_argument_exception",
        "reason": "Unknown parameter [token_filters] in request body or parameter is of the wrong type[START_ARRAY] "
    },
    "status": 400
}

解决: 修改params的key名称

# POST
url: /_analyze/
method: POST
params : {
  "tokenizer": "keyword",
  "filter": [
    "lowercase"
  ],
  "char_filter": [
    "html_strip"
  ],
  "text": "this is a test"
}

4 按_all字段不能查询到数据

# POST
url: /meta_test/_search/
method: POST
params : {
  "query": {
    "match": {
      "_all": "yan shaowen"
    }
  }
}

返回查询结果为空数组

{
    "took": 264,
    "timed_out": false,
    "_shards": {
        "total": 1,
        "successful": 1,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": 0,
        "max_score": null,
        "hits": []
    }
}

现有的数据为

{
    "_index": "meta_test",
    "_type": "_doc",
    "_id": "e6uod2cBb7ER3WX6wipL",
    "_version": 1,
    "_score": 1,
    "_source": {
        "first_name": "yan",
        "last_name": "shaowen",
        "date_of_birth": "1993-03-14"
    }
}

解决: 6.x版本_all为禁用 并且不能启用,测试启用时报错如下

# POST
url: /meta_test/_doc/_mapping/
method: PUT
params : {
  "_doc": {
    "_all": {
      "enabled": true
    }
  }
}

{
    "error": {
        "root_cause": [{
            "type": "illegal_argument_exception",
            "reason": "Enabling [_all] is disabled in 6.0. As a replacement, you can use [copy_to] on mapping fields to create your own catch all field."
        }],
        "type": "illegal_argument_exception",
        "reason": "Enabling [_all] is disabled in 6.0. As a replacement, you can use [copy_to] on mapping fields to create your own catch all field."
    },
    "status": 400
}

使用query_string查询

{
  "query": {
    "query_string": {
      "query": "yan shaowen"
    }
  }
}