技術標籤：Elasticsearch實戰elasticsearch

Elasticsearch實戰

根據使用者ID、是否隱藏、帖子ID、發帖日期來搜尋帖子

PUT /forum/post/_bulk
{"index":{"_id":1}}
{"id":"XHDK-A-1293-#fJ3","userId":1,"postDate":"2020-12-16","hidden":true}
{"index":{"_id":2}}
{"id":"XGFJ-A-1273-#fJ3","userId":2,"postDate":"2020-12-15","hidden":false}
{"index":{"_id":3}}
{"id":"AHFS-A-2393-#ad5","userId":3,"postDate":"2020-11-05","hidden":false}
{"index":{"_id":4}}
{"id":"AJFS-A-2393-#as3","userId":3,"postDate":"2020-10-13","hidden":true}
 

檢視下mapping,es7版本，type=text，預設會設定兩個field，一個是field本身，比如articleID，就是分詞的；還有一個的話，就是field.keyword預設不分詞，會最多保留256個字元

GET /forum/_mapping/post?include_type_name=true

#! Deprecation: [types removal] Using include_type_name in get mapping requests is deprecated. The parameter will be removed in the next major version.

{
"forum" : {
"mappings" : {
"post" : {
"properties" : {
"hidden" : {
"type" : "boolean"
},
"id" : {
"type" : "text",
"fields" : {
"keyword" : {

"type" : "keyword",
"ignore_above" : 256
}
}
},
"postDate" : {
"type" : "date"
},
"userId" : {
"type" : "long"
}
}
}
}
}
}

根據使用者ID搜尋帖子

# 這樣查詢沒有資料，因為term是完全匹配
GET /forum/post/_search
{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "id": "XHDK-A-1293-#fJ3"
          }
        }
      ]
    }
  }
}


# 這樣可以查詢資料，因為field.keyword預設不分詞，會最多保留256個字元
GET /forum/post/_search
{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "id.keyword": "XHDK-A-1293-#fJ3"
          }
        }
      ]
    }
  }
}

設定id型別為keyword後再用第一條查詢就會出來資料了

PUT /forum?include_type_name=true
{
  "mappings": {
    "post":{
      "properties":{
        "id":{
          "type":"keyword"
        }
      }
    }
  }
}

搜尋沒有隱藏的帖子

GET /forum/post/_search
{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "hidden": false
          }
        }
      ]
    }
  }
}

根據發帖日期搜尋帖子

GET /forum/post/_search
{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "postDate": "2020-12-15"
          }
        }
      ]
    }
  }
}

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