Elasticsearch suggester搜索建議初步

環境

• Elasticsearch 2.3.5
• Elasticsearch-ik-plugin

實現

• 搜索建議的對象
  假設有以下兩個json對象，需要對其中tags字段進行搜索建議：

//對象Product1
{
    "title": "Product1",
    "description": "Product1 Description",
    "tags": [
        "山東",
        "山東高新開發區",
        "山東大學",
        "two columns",
        "wordpress"
    ]
}

//對象Product2
{
    "title": "Product2",
    "description": "Product2 Description",
    "tags": [
        "山東省",
        "山東公安局",
        "山東檢察院",
        "skrill",
        "wordland"
    ]
}

• 設置索引mapping
  建立索引suggester_ik_test和mapping，如下：
  注意使用的suggester類型為completion

curl -XPUT "http://10.110.13.57:9200/suggester_ik_test?pretty" -d'
    {
   "mappings": {
      "product": {
         "properties": {
            "description": {
               "type": "string"
            },
            "tags": {
               "type": "string"
            },
            "title": {
               "type": "string"
            },
            "tag_suggest": {
               "type": "completion",
               "analyzer": "ik_max_word",
               "search_analyzer": "ik_max_word",
               "payloads": false
            }
         }
      }
   }
}'

• 索引數據
  根據上述索引和mapping對json數據建立索引：

//Product1
curl -XPUT "http://10.110.13.57:9200/suggester_ik_test/product/1?pretty" -d'
    {
   "title": "Product1",
   "description": "Product1 Description",
   "tags": [
         "山東",
         "山東高新開發區",
         "山東大學",
         "two columns",
         "wordpress"
   ],
   "tag_suggest": {
      "input": [
         "山東",
         "山東高新開發區",
         "山東大學",
         "two columns",
         "wordpress"
      ]
   }
}'

//Product2
curl -XPUT "http://10.110.13.57:9200/suggester_ik_test/product/2?pretty" -d'
{
    "title": "Product2",
    "description": "Product2 Description",
    "tags": [
        "山東省",
        "山東公安局",
        "山東檢察院",
        "skrill",
        "wordland"
    ],
   "tag_suggest": {
      "input": [
        "山東省",
        "山東公安局",
        "山東檢察院",
        "skrill",
        "wordland"
      ]
   }
}'

• 測試
  搜索“山東”，查看是否有搜索建議提示生效：

curl -XPOST "http://10.110.13.57:9200/suggester_ik_test/_suggest?pretty" -d'
    {
    "product_suggest":{
        "text":"山東",
        "completion": {
            "field" : "tag_suggest"
        }
    }
}'

//應該得到以下數據
{
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "product_suggest" : [ {
    "text" : "山東",
    "offset" : 0,
    "length" : 2,
    "options" : [ {
      "text" : "山東",
      "score" : 1.0
    }, {
      "text" : "山東公安局",
      "score" : 1.0
    }, {
      "text" : "山東大學",
      "score" : 1.0
    }, {
      "text" : "山東檢察院",
      "score" : 1.0
    }, {
      "text" : "山東省",
      "score" : 1.0
    } ]
  } ]
}

參考資料

Quick and Dirty Autocomplete with Elasticsearch Completion Suggest