Creating a custom parser in the ElasticSearch Nest client
I'm very new to elasticsearch using a socket client, I am creating an index using a custom parser, however when testing using parsing, it doesn't seem to be using a custom parser. Mostly not showing edgengram tokens. Is there something I can't see that will make my custom parser default for the index? When I check my mappings with elastichq they show my custom parser.
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);
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1 answer
You have added your own parser to your index, but now you need to apply it to your fields. You can do it at the 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 default fields by setting it as your index's default parser:
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 information here regarding the default settings for the analyzer.
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