[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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Antoine Herzog commented on HHH-3704:
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Oups....
I have found the proper way to do this.
use an alias for direct access to the related entity.
order clause is on : commonInfo_shipFlag.name
(commonInfo_shipFlag is the alias).
and it works...
idem for the filter : use the alias in the criteria for the where clause.
*******************
May be this is a way to solve the problem for the MappedSuperclasses
I don't know, but it may work...
that would explain why the HQL works, but not the Criteria
*******************
parsing and decoding of : a.b.c.d for the properties would be a nice feature.
using some alias is a bit more complex (must remind the alias to build the filter
clause... not easy for query automatic generation).
is this possible ?
there is a problem to decode several level of entities/properties ?
*******************
sorry for the unproper comments on this Jira.
Antoine
Criteria Query on property of sandwich-like @MappedSuperclass fails.
HQL works
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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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