在ElasticSearch Nest客户端中创建自定义分析器

时间:2014-08-07 23:20:47

标签: elasticsearch nest

我对使用nest客户端的elasticsearch非常新,我正在使用自定义分析器创建索引,但是当使用analyze进行测试时,它似乎不使用自定义分析器。主要没有出现edgengram标记。我有什么遗漏会使我的自定义分析器成为索引的默认值吗?当我使用elastichq检查我的映射时,它们会显示我的自定义分析器。

ConnectionSettings settings = new ConnectionSettings(new Uri("http://localhost:9200"),    defaultIndex: "forum-app");

 IndexSettings indsettings = new IndexSettings();

   var an = new CustomAnalyzer();

   an.CharFilter = new List<string>();
   an.CharFilter.Add("html_strip");
   an.Tokenizer = "edgeNGram";
   an.Filter = new List<string>();
   an.Filter.Add("standard");
   an.Filter.Add("lowercase");
   an.Filter.Add("stop");

indsettings.Analysis.Tokenizers.Add("edgeNGram", new Nest.EdgeNGramTokenizer
{
    MaxGram = 15,
    MinGram = 3
});

indsettings.Analysis.Analyzers.Add("forumanalyzer", an);

ElasticClient client = new ElasticClient(settings);

client.CreateIndex("forum-app", c => c
.NumberOfReplicas(0)
.NumberOfShards(1)
.AddMapping<Forum>(e => e.MapFromAttributes())
.Analysis(analysis => analysis
.Analyzers(a => a
.Add("forumanalyzer", an) 
)));        

//To index I just do this       
client.Index(aForum);

2 个答案:

答案 0 :(得分:6)

您已将自定义分析器添加到索引中,但现在需要将其应用于您的字段。您可以在字段映射级别执行此操作:

client.CreateIndex("forum-app", c => c
    .NumberOfReplicas(0)
    .NumberOfShards(1)
    .AddMapping<Forum>(e => e
        .MapFromAttributes()
        .Properties(p => p
            .String(s => s.Name(f => f.SomeProperty).Analyzer("formanalyzer")))
    )
    .Analysis(analysis => analysis
        .Analyzers(a => a
            .Add("forumanalyzer", an)
        )
    )
);

或者您可以将其设置为索引的默认分析器,默认情况下将其应用于所有字段:

client.CreateIndex("forum-app", c => c
    .NumberOfReplicas(0)
    .NumberOfShards(1)
    .AddMapping<Forum>(e => e.MapFromAttributes())
    .Analysis(analysis => analysis
        .Analyzers(a => a
            .Add("default", an)
        )
    )
);

More info here关于分析仪默认值。

答案 1 :(得分:0)

添加自定义分析器:

var indexConfig = new IndexState
{
    Settings = indexSettings
};

 var createIndexResponse = elasticClient.CreateIndex(indexName, c => c
   .InitializeUsing(indexConfig)
   .Mappings(m => m
       .Map<ElasticsearchModel>(mm => mm
           .Properties(
           p => p
           .Text(t => t.Name(elasticsearchModel => elasticsearchModel.StringTest).Analyzer("customAnalyzerLowercaseSynonymAsciifolding"))                          
           )
       )
   )
);

elasticClient.Refresh(indexName);

然后在创建索引时,指定分析器:

var response = elasticClient.Search<ElasticsearchModel>(s => s
        .Index(indexName)
        .Query(q => q
              .SimpleQueryString(qs => qs
                  .Fields(fs => fs
                       .Field(f => f.StringTest, 4.00)
                  )
                  .Query(query)
                 )
               )
           );

var results = new List<ElasticsearchModel>();
results = response.Hits.Select(hit => hit.Source).ToList();

然后用以下内容查询:

{{1}}