使用NEST创建自定义令牌过滤器

Ievgen Martynov 发表于 Dev

伊夫根·马蒂诺夫（Ievgen Martynov）

如何使用带有此类JSON的NEST配置索引：

"settings":{
  "analysis":{
     "filter":{
        "name_ngrams":{
           "side":"front",
           "max_gram":50,
           "min_gram":2,
           "type":"edgeNGram"
        }
     },
     "analyzer":{            
        "partial_name":{
           "filter":[
              "standard",
              "lowercase",
              "asciifolding",
              "name_ngrams"
           ],
           "type":"custom",
           "tokenizer":"standard"
        }
     }
  }

我可以使用CustomAnalyzer类创建自定义分析器，但找不到如何创建自定义过滤器并将其注册到分析器中的方法。

提前致谢！

伊夫根·马蒂诺夫（Ievgen Martynov）

经过一番搜索，我找到了一个解决方案：

var partialName = new CustomAnalyzer
            {
                Filter = new List<string> {"lowercase", "name_ngrams", "standard", "asciifolding"},
                Tokenizer = "standard"
            };

var fullName = new CustomAnalyzer
            {
                Filter = new List<string> {"standard", "lowercase", "asciifolding"},
                Tokenizer = "standard"
            };

client.CreateIndex("indexname", c => c
                .Analysis(descriptor => descriptor
                    .TokenFilters(bases => bases.Add("name_ngrams", new EdgeNGramTokenFilter
                    {
                        MaxGram = 20,
                        MinGram = 2,
                        Side = "front"
                    }))
                    .Analyzers(bases => bases
                        .Add("partial_name", partialName)
                        .Add("full_name", fullName))
                )
                .AddMapping<Company>(m => m
                    .Properties(o => o
                        .String(i => i
                            .Name(x => x.Name)
                            .IndexAnalyzer("partial_name")
                            .SearchAnalyzer("full_name")
                        ))));