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Query on a attribute in the interface that is used for variable 1-1 mapping [message #933779]

Fri, 05 October 2012 10:35

Rice Yeh

Messages: 20
Registered: July 2009

Junior Member

Hi,
I am moving my project from hibernate to eclipselink because of its richer OR mapping. One of these mappings impresses me is the variable 1-1 relationship and seems that joining on the variable 1-1 relationship is supported (right?). However, I find that I cannot set a criteria based on an attribute on the interface used for the variable 1-1 relationship with no mapping for the attribute is found as show in the following section. Of course, I can use subquery to get my job done but if joining on the variable 1-1 supported, using subquery seems not over-skill.

java.lang.IllegalArgumentException: The attribute [number] from the managed type [EntityTypeImpl@178721701:Orderable [ javaType: interface xs.logistics.Orderable descriptor: RelationalDescriptor(xs.logistics.Orderable --> []), mappings: 0]] is not present.
at org.eclipse.persistence.internal.jpa.metamodel.ManagedTypeImpl.getAttribute(ManagedTypeImpl.java:147)
at org.eclipse.persistence.internal.jpa.querydef.FromImpl.get(FromImpl.java:312)

Rice

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Re: Query on a attribute in the interface that is used for variable 1-1 mapping [message #933989 is a reply to message #933779]

Fri, 05 October 2012 14:38

Gordon Yorke

Messages: 78
Registered: July 2009

Member

Unfortunately joins across Variable One To One mappings is not supported. Some suggested workarounds can be found here: http://www.eclipse.org/forums/index.php/mv/msg/169394/538463/#msg_538463

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