当我使用完成暗示器时，我如何获得独特的建议而不重复？

Question

我在我的环境中使用弹性5.1.1。我选择了一个字段名post_hashtags上的completation suggester和一个字符串数组，以便对其进行建议。我得到以下关于前缀“inv”的回应

请求：

POST hashtag/_search?pretty&&filter_path=suggest.hash-suggest.options.text,suggest.hash-suggest.options._source
{"_source":["post_hashtags" ],

"suggest": {
    "hash-suggest" : {
        "prefix" : "inv",
        "completion" : {
            "field" : "post_hashtags"
        }
    }
}

{
  "suggest": {
    "hash-suggest": [
      {
        "options": [
          {
            "text": "invalid",
            "_source": {
              "post_hashtags": [
                "invalid"
              ]
            }
          },
          {
            "text": "invalid",
            "_source": {
              "post_hashtags": [
                "invalid",
                "coment_me",
                "daya"
              ]
            }
          }
        ]
      }
    ]
  }

Answer 1

ElasticSearch6.1引入了skip_duplicates运算符。用法示例：

{
  "suggest": {
    "autocomplete": {
      "prefix": "MySearchTerm",
      "completion": {
        "field": "name",
        "skip_duplicates": true
      }
    }
  }
}