Hibernate标准JOIN +附加条件(带子句)不适用于多对多关联

时间:2012-05-27 20:54:36

标签: java hibernate criteria

我正在尝试使用hibernate条件为Join子句添加附加条件。事实上,有一些方法可以做到这一点:

createCriteria(String associationPath, String alias, int joinType, Criterion withClause)

createAlias(String associationPath, String alias, int joinType, Criterion withClause) 

他们以一对一和一对多的关系正常工作。但是,当我尝试将它们与具有多对多关系的实体一起使用时,我遇到了以下错误:

Caused by: org.postgresql.util.PSQLException: No value specified for parameter 1.

任何人都可以帮助我吗? 粗鲁的例子如下:

@Entity
public class Person {

@Id
@GeneratedValue
private Long id;

@ManyToMany
private Set<PersonName> names;

}

public class PersonName {

@Id
@GeneratedValue
private Long id;

@Column
private String name;

}
public class PersonDao extends HibernateDaoSupport {

public List<Person> findByName() {
    Criteria criteria = getSession().createCriteria(Person.class, "p");
    criteria.createCriteria("p.names", "names", JoinType.INNER_JOIN, Restrictions.eq("name", "John"));
    return criteria.list();
}
}

生成的查询是

select this_.id as y0_ from person this_ 
    inner join debtor_info this_1_ on this_.id=this_1_.id 
    left outer join person_person_name personname3_ on this_.id=personname3_.person_id and ( name1_.name=? ) 
    left outer join person_name name1_ on personname3_.person_name_id=name1_.id and ( name1_.name=? )

正如您所看到的,连接条件正在被添加两次,这显然是不正确的

提前致谢。

BTW我正在使用postgresql 9,Hibernate 3.6.3

1 个答案:

答案 0 :(得分:4)

这是一个错误HHH-7355 Hibernate criteria JOIN + additional condition (with clause) don't work with many-to-many association并且它不会被修复,因为Hibernate Criteria API已被弃用,您应该使用JPA Crtiterias。 您可以尝试使用HQL with clause

from Cat as cat
left join cat.kittens as kitten
    with kitten.bodyWeight > 10.0