HibernateSearch 查询通过 FieldBridge 索引的虚拟字段

Question

我使用的是 5.0 版的 Hibernate Search。0.Final。我在 1 table 中索引了 1 个字段。我正在使用 FieldBridge 来索引该字段：

public class CustomBridge implements FieldBridge {

    @Override
    public void set(String name, Object value, Document document, LuceneOptions luceneOptions) {
        MyFieldType file = (ProductOrderJsonEntity) value;
        if (file.getA() != null && file.getB() != null) {
            luceneOptions.addFieldToDocument(name + ".ABconcat", file.getA() + file.getB(), document);
        }
    }
}

我正在使用 FieldBridge 索引数据库中不存在的字段，所以当我尝试进行这样的查询时，它崩溃了：

EntityManager em = entityManagerFactory.createEntityManager();
FullTextEntityManager fullTextEntityManager = org.hibernate.search.jpa.Search.getFullTextEntityManager(em);
em.getTransaction().begin();

QueryBuilder qb = fullTextEntityManager.getSearchFactory().buildQueryBuilder().forEntity(MyEntity.class).get();
org.apache.lucene.search.Query luceneQuery = qb.keyword().onFields("productOrder.internalReference", "techId").matching(keyword).createQuery();

javax.persistence.Query jpaQuery = fullTextEntityManager.createFullTextQuery(luceneQuery, MyEntity.class);

... 出现以下错误：

org.hibernate.search.exception.SearchException: Unable to find field field.ABconcat in com.something.myapp.MyEntity

显然它试图将我在 luceneQuery 中提供的字段映射到对象字段（在我的例子中是 MyEntity）。

有什么方法可以查询数据库中不存在的自定义字段的索引吗？

谢谢。

Answer 1

我刚刚发现 this post，它解释了您可以像这样查询已通过 FieldBridge 编制索引的字段：

针对多个字段的查询

int year = datetime.getYear();
int month = datetime.getMonthOfYear();
int day = datetime.getDayOfMonth();

QueryBuilder qb = sm.buildQueryBuilderForClass(BlogEntry.class).get();
Query q = qb.bool()
    .must( qb.keyword().onField("creationdate.year").ignoreFieldBridge().ignoreAnalyzer()
                .matching(year).createQuery() )
    .must( qb.keyword().onField("creationdate.month").ignoreFieldBridge().ignoreAnalyzer()
                .matching(month).createQuery() )
    .must( qb.keyword().onField("creationdate.day").ignoreFieldBridge().ignoreAnalyzer()
                .matching(day).createQuery() )
   .createQuery();

CacheQuery cq = sm.getQuery(q, BlogEntry.class);
System.out.println(cq.getResultSize());

The key is to:

target directly each field,

disable the field bridge conversion for the query,

and it’s probably a good idea to disable the analyzer.

It’s a rather advanced topic and the query DSL will do the right thing most of the time. No need to panic just yet.

But in case you hit a complex type needs, it’s interesting to understand what is going on underneath.

HibernateSearch 查询通过 FieldBridge 索引的虚拟字段

HibernateSearch querying on virtual fields indexed via FieldBridge

lucene

hibernate

hibernate-search