elasticsearch - 是否可以进行nGram模糊搜索？

Question

我正在尝试让nGram过滤器与模糊搜索一起使用，但不会。具体来说，我正在尝试使“粗糙”与“粗糙”匹配。

我不知道这是不可能的，还是可能的，但是我定义了错误的映射，或者映射很好，但是我的搜索未正确定义。

对应:

{
    settings = new
        {
            index = new
            {
                number_of_shards = 1,
                number_of_replicas = 1,

                analysis = new
                {
                    filter = new
                    {
                        edge_ngram_filter = new
                        {
                            type = "nGram",
                            min_gram = 3,
                            max_gram = 8
                        }
                    }, // filter

                    analyzer = new
                    {
                        analyzer_ngram = new
                        {
                            type = "custom",
                            tokenizer = "standard",
                            filter = new string[]
                            {
                                "lowercase",
                                "edge_ngram_filter"
                            }
                        }
                    }  // analyzer

                } // analysis

            } // index
        },  //  settings

    mappings = new
    {
        j_cv = new
        {
            properties = new
            {
                Text = new
                {
                    type = "text",
                    include_in_all = false,
                    analyzer = "analyzer_ngram",
                    search_analyzer = "standard"
                }
            }
        }   //  j_cv
    }   //  mappings
}

文件:

{
   Id = Guid.NewGuid(),
   Name = "Jimmy Riddle",
   Keyword = new List<string>(new string[] { "Hunting", "High", "Hotel", "California" }),
   Text = "Rough Justice was a program on BBC some years ago. It was quite interesting. Will this match?"
}

搜索:

{
    query = new
    {
        query_string = new
        {
            fields = new string[] { "Text" },
            fuzziness = "3",
            query = "rugh"
        }
    }
}

顺便说一句，“ugh”确实符合您的期望。

谢谢你提供的所有帮助，

亚当。

Answer 1

通常应在索引和搜索时应用同一分析器，因此search_analyzer=standard是错误的，如果将其删除，它应该可以工作。
https://www.elastic.co/guide/en/elasticsearch/reference/current/search-analyzer.html

编辑:
您在查询中忘记了模糊运算符“〜”，如果将其添加到“rugh”，它将起作用!