Question

我在使用Nest API在Elastic中使用同义词时遇到了麻烦。

我已经设置了我的索引和所有相应的设置，但是当我查询一个应该是同义词的术语时，结果看起来好像根本没有被应用。这是我的设置：

m_objNode = new Uri(Properties.Settings.Default.strLocalElasticSearchURL);
m_objConnectionSettings = new ConnectionSettings(m_objNode, defaultIndex: "myIndex");
m_objElasticClient = new ElasticClient(m_objConnectionSettings);

IndexSettings indexSettings = new IndexSettings();
indexSettings.NumberOfReplicas = 1;
indexSettings.NumberOfShards = 1;

CustomAnalyzer exclamation = new CustomAnalyzer();
exclamation.Tokenizer = "exclamationTokenizer";

indexSettings.Analysis.Tokenizers.Add("exclamationTokenizer", new PatternTokenizer {
    Pattern = @"!"
});

indexSettings.Analysis.Analyzers.Add("exclamation", exclamation);
indexSettings.Analysis.TokenFilters.Add("synonym", new SynonymTokenFilter { Synonyms = new[] { "tire => tyre", "aluminum => aluminium" }, IgnoreCase = true, Tokenizer = "whitespace" });

m_objElasticClient.CreateIndex(c => c
    .Index("myIndex")
    .InitializeUsing(indexSettings)
    .AddMapping<myClass>(m => m
        .MapFromAttributes()
        .IndexAnalyzer("english")
        .SearchAnalyzer("english")                              
        ));

我索引的对象看起来像这样：

[ElasticType(IdProperty = "JAUniqueKey")]
public class myClass {

    public string JAUniqueKey { get; set; }
    public int JAItemID { get; set; }
    public string JATitle { get; set; }
    public string JABody { get; set; }
}

我试图让字段JATitle和JABody与同义词对齐。

任何想法都会受到欢迎。

谢谢， ScrappyT

Answer 1

您已正确创建了令牌过滤器，但未将其添加到自定义分析器的过滤器中。

IndexSettings indexSettings = new IndexSettings();
indexSettings.NumberOfReplicas = 1;
indexSettings.NumberOfShards = 1;

CustomAnalyzer exclamation = new CustomAnalyzer();
exclamation.Tokenizer = "exclamationTokenizer";
exclamation.Filter = new List<string> {"synonym"};
indexSettings.Analysis.Tokenizers.Add("exclamationTokenizer", new PatternTokenizer
{
});

indexSettings.Analysis.Analyzers.Add("exclamation", exclamation);
indexSettings.Analysis.TokenFilters.Add("synonym", new SynonymTokenFilter { Synonyms = new[] { "tire => tyre", "aluminum => aluminium" }, IgnoreCase = true, Tokenizer = "whitespace" });

希望它有所帮助。

通过Nest在Elasticsearch中使用同义词

1 个答案: