0
此查询不再用于工作。 (我切换到注释,这是两个破剩余试验之一。)带连接表的休眠HQL
我有三个表:
+---------------+
| Competition |
+---------------+
| competitionId |
| . . . |
+---------------+
+---------------+
| Competitor |
+---------------+
| competitorId |
| . . . |
+---------------+
+------------------------+
| CompetitionCompetitors |
+------------------------+
| competitionId |
| competitorId |
+------------------------+
和代码/查询使用工作是
Query query = session.createQuery(
"select c.id from Competition c join c.competitors co where co.id = :competitorId");
query.setParameter("competitorId", competitor.getCompetitorId());
List list = query.list();
下面是一些前面的SQL日志记录从休眠到来,再加上错误信息:
Hibernate: update db.competition set competitorId=? where competitionId=?
Hibernate: update db.competition set competitorId=? where competitionId=?
Hibernate: update db.competition set competitorId=? where competitionId=?
17:12:49,232 WARN JDBCExceptionReporter:233 - SQL Error: 1054, SQLState: 42S22
17:12:49,240 ERROR JDBCExceptionReporter:234 - Unknown column 'competitorId' in 'field list'
(得承认,我很惊讶地看到发生在一个查询更新)。
这里的注释在竞争:
@OneToMany(targetEntity = Competition.class)
@JoinColumn(name = "competitorId")
private Set<Competitor> competitors = new TreeSet<Competitor>();
我是怎么了效果也很糟糕?
非常了解映射和JPA。谢谢!这使查询工作。 – Marvo