[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3704) Criteria Query on property of sandwich-like @MappedSuperclass fails. HQL works
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-3704?page=c...
]
Vikash Madhow commented on HHH-3704:
------------------------------------
Well, AFAIK, you do not need to join A to B to be able to sort by b.s if B is only a
component of A. I've been sorting by component properties in my system and it works.
It makes sense for Hibernate to throw an exception if you attempt to join A to B since
components are stored in the same table as their container and as such a join is not
meaningful.
To illustrate, if you have the following:
@Entity
class A {
@Embedded
B b;
}
@Embeddable
class B {
String s;
C c;
}
@Entity
class C {
String t;
}
sorting by b.s requires no join. Sorting b.c.t, however, requires a Join from A to C (and
not B to C).
Hope this helps.
V.
Criteria Query on property of sandwich-like @MappedSuperclass fails.
HQL works
------------------------------------------------------------------------------
Key: HHH-3704
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3704
Project: Hibernate Core
Issue Type: Bug
Components: query-criteria
Affects Versions: 3.3.1
Environment: hibernate 3.3.1, mysql 5.0.45
Reporter: Christian kalkhoff
Priority: Minor
I have a hierarchy of @MappedSuperclasses, in my case:
@MappedSuperclass class BaseEntity{...}
@MappedSuperclass class NamedBaseEntity extends BaseEntity {...}
@Entity class ConcreteEntity extends NamedBaseEntity {...}
@Entity class AggregatingOtherEntity extends NamedBaseEntity {
ConcreteEntity concreteEntity;
}
BaseEntity holds property "id", NamedBaseEntity holds property
"name". ConcreteEntity might have property "moonphase".
If I create a Criteria search expression on AggregatingOtherEntity like
eq("concreteEntity.id", 1L)
that works.
eq("concreteEntity.moonphase", "half decending") works either.
BUT
like("concreteEntity.name", "foobar")
raises QueryException:
org.hibernate.QueryException: could not resolve property: concreteEntity.name of:
AggregatingOtherEntity
org.hibernate.persister.entity.AbstractPropertyMapping.propertyException(AbstractPropertyMapping.java:67)
org.hibernate.persister.entity.AbstractPropertyMapping.toColumns(AbstractPropertyMapping.java:82)
org.hibernate.persister.entity.BasicEntityPropertyMapping.toColumns(BasicEntityPropertyMapping.java:54)
org.hibernate.persister.entity.AbstractEntityPersister.toColumns(AbstractEntityPersister.java:1377)
org.hibernate.loader.criteria.CriteriaQueryTranslator.getColumns(CriteriaQueryTranslator.java:457)
org.hibernate.loader.criteria.CriteriaQueryTranslator.getColumnsUsingProjection(CriteriaQueryTranslator.java:417)
org.hibernate.criterion.SimpleExpression.toSqlString(SimpleExpression.java:68)
org.hibernate.criterion.LogicalExpression.toSqlString(LogicalExpression.java:62)
org.hibernate.loader.criteria.CriteriaQueryTranslator.getWhereCondition(CriteriaQueryTranslator.java:357)
org.hibernate.loader.criteria.CriteriaJoinWalker.<init>(CriteriaJoinWalker.java:113)
org.hibernate.loader.criteria.CriteriaJoinWalker.<init>(CriteriaJoinWalker.java:82)
org.hibernate.loader.criteria.CriteriaLoader.<init>(CriteriaLoader.java:91)
org.hibernate.impl.SessionImpl.list(SessionImpl.java:1577)
org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:306)
[...]
If I refactor the Criteria search to plain HQL (From AggregatingOtherEntity Where
concreteEntity.name like 'half decending') it works. So there is a workaround.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://opensource.atlassian.com/projects/hibernate/secure/Administrators....
-
For more information on JIRA, see: http://www.atlassian.com/software/jira