我的 Hibernate Search 分析器配置存在一些问题。
我的索引实体之一(“Hospital”)有一个字符串字段(“name”),其中可能包含长度为 1-40 的值。我希望能够通过仅搜索一个字符来找到一个实体(因为医院有可能只有单个字符名称)。
@Indexed(index = "HospitalIndex")
@AnalyzerDef(name = "ngram",
tokenizer = @TokenizerDef(factory = StandardTokenizerFactory.class),
filters = {
@TokenFilterDef(factory = StandardFilterFactory.class),
@TokenFilterDef(factory = LowerCaseFilterFactory.class),
@TokenFilterDef(factory = NGramFilterFactory.class,
params = {
@Parameter(name = "minGramSize", value = "1"),
@Parameter(name = "maxGramSize", value = "40")})
})
public class Hospital {
@Field(index = Index.YES, analyze = Analyze.YES, store = Store.NO, analyzer = @Analyzer(definition = "ngram"))
private String name = "";
}
如果我添加一家名为“My Test Hospital”的医院,Lucene 索引将如下所示:
1 name al
1 name e
1 name es
1 name est
1 name h
1 name ho
1 name hos
1 name hosp
1 name hospi
1 name hospit
1 name hospita
1 name hospital
1 name i
1 name it
1 name ita
1 name ital
1 name l
1 name m
1 name my
1 name o
1 name os
1 name osp
1 name ospi
1 name ospit
1 name ospita
1 name ospital
1 name p
1 name pi
1 name pit
1 name pita
1 name pital
1 name s
1 name sp
1 name spi
1 name spit
1 name spita
1 name spital
1 name st
1 name t
1 name ta
1 name tal
1 name te
1 name tes
1 name test
1 name y
1 name a
这就是我构建和执行搜索查询的方式:
QueryBuilder hospitalQb = fullTextEntityManager.getSearchFactory().buildQueryBuilder().forEntity(Hospital.class).get();
Query hospitalQuery = hospitalQb.keyword().onFields("name")().matching(searchString).createQuery();
javax.persistence.Query persistenceQuery = fullTextEntityManager.createFullTextQuery(hospitalQuery, Hospital.class);
List<Hospital> results = persistenceQuery.getResultList();
问题是相同的 ngram 分析器也用于我的搜索查询。因此,当我搜索“医院”时,我会找到名称中包含“a”字符的所有医院。
当我对其调用 toString 方法时,搜索查询如下所示:
name:h name:ho name:hos name:hosp name:hospi name:hospit name:hospita name:hospital name:o name:os name:osp name:ospi name:ospit name:ospita name:ospital name:s name:sp name:spi name:spit name:spita name:spital name:p name:pi name:pit name:pita name:pital name:i name:it name:ita name:ital name:t name:ta name:tal name:a name:al name:l
所以问题是,是否有人知道更好的分析器配置或另一种构建解决问题的搜索查询的方法?