[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3704) Criteria Query on property of sandwich-like @MappedSuperclass fails. HQL works
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http://opensource.atlassian.com/projects/hibernate/browse/HHH-3704?page=c...
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Kaspar Fischer commented on HHH-3704:
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Thanks, Vikash, for your quick response and sharing of your code.
Unfortunately, I realize that I am in a slightly different situation. I don't have
property paths to entities but to components.
Something like this:
@Entity
class A {
@Embedded
B b;
}
@Embeddable
class B {
String s;
}
and I want to list the rows in A sorted by "b.s". With aliases you can, it
seems, not handle this case. - Or am I making a mistake at some stage?
(P.S. "Java Persistence with Hibernate" 2007 says: "Finally, note that at
the time of writing only joining of associated entities or collections that contain
references to entities (one-to-many and many-to-many) is supported in Hibernate with the
Criteria API. The following example tries to join a collection of components: [...]
Hibernate fails with an exception [...]")
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.
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