在ElasticSearch Nest客户端中创建自定义分析器 [英] Creating a custom analyzer in ElasticSearch Nest client

问题描述

对于使用嵌套客户端的Elasticsearch来说，我是一个非常新的人，我正在使用自定义分析器创建索引，但是在使用分析进行测试时，它似乎并没有使用自定义分析器.主要没有Edgengram令牌出现.我缺少使我的自定义分析器成为索引默认值的内容吗?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);

解决方案

您已将自定义分析器添加到索引中，但是现在您需要将其应用于字段.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)
        )
    )
);

或者您可以通过将其设置为索引的默认分析器来默认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)
        )
    )
);

此处更多有关分析仪默认值的信息. >

Im very very new to elasticsearch using the nest client, I am creating an index with a custom analyzer, however when testing using analyze it does not seem to use the custom analyzer. Mainly no edgengram tokens appear. Is there anything I am missing that would make my custom analyser the default for the index? When I check my mappings using elastichq they show my custom analyzer.

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);

解决方案

You've added your custom analyzer to your index, but now you need to apply it your fields. You can do this on a field mapping level:

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)
        )
    )
);

Or you can apply it to all fields by default by setting it as the default analyzer of your index:

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 in regards to analyzer defaults.

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