Hibernate Search(lucene)是否有可能组合两个不同的查询。例如,当我想搜索2个应具有一个相应匹配值的字段时:
firstname - John
lastname - Doe
qBuilder.keyword().onField("firstname").matching("John").createQuery());
qBuilder.keyword().onField("lastname").matching("Doe").createQuery());
是从这一个查询中获得的一种方法吗?
答案 0 :(得分:7)
注意: 这样可行,但对于更多Hibernate-esque方法,请参阅我的其他答案
createQuery()
返回标准Lucene Query。因此,在Lucene中合并两个查询的典型方法是使用BooleanQuery:
Query query1 = qBuilder.keyword().onField("firstname").matching("John").createQuery();
Query query2 = qBuilder.keyword().onField("lastname").matching("Doe").createQuery();
BooleanQuery bq = new BooleanQuery();
//Assuming you want to require a match on both first and last names.
//If a match on either is enough, use BooleanClause.Occur.SHOULD
bq.add(new BooleanClause(query1, BooleanClause.Occur.MUST));
bq.add(new BooleanClause(query2, BooleanClause.Occur.MUST));
答案 1 :(得分:6)
而不是直接使用Lucene BooleanQuery
,更多的Hibernate方法是使用Hibernate bool()
查询(参见documentation here的5.1.2.6节):
Query query = qBuilder.bool()
.must(qBuilder.keyword().onField("firstname").matching("John").createQuery())
.must(qBuilder.keyword().onField("lastname").matching("Doe").createQuery())
.createQuery();