InvalidObjectIdentifierException for returning single record of a OneToMany relationship

[fong81]

Hi,

I have EntityA with a one to many relation to EntityB. I am trying to match a list of values for an attribute in EntityB in order to display EntityA via the filter expression. Displaying a list is working fine for "http://localhost:8081/api/v1/entityA" but I encountered error "InvalidObjectIdentifierException: Unknown identifier 1 for entityA" when I tried with "http://localhost:8081/api/v1/entityA/1".

@SecurityCheck(AbcFilter.PRINCIPAL_HAS_ACCESS)
public class AbcFilter extends FilterExpressionCheck {
public static final String PRINCIPAL_HAS_ACCESS = "user has access to entity A";

@Override
public FilterExpression getFilterExpression(Type<?> entityClass, RequestScope requestScope) {
	List<Object>codes = new ArrayList<>(UserUtil.getCodes(requestScope.getUser())); 		
	Path.PathElement xyzPathElement = new Path.PathElement(EntityA.class, EntityB.class, "bEntities");
	Path.PathElement abcPathElement = new Path.PathElement(EntityB.class, String.class, "code");
	List<Path.PathElement> zPathList = Arrays.asList(xyzPathElement, abcPathElement);
	Path pppPath = new Path(zPathList);
	return new FilterPredicate(pppPath, Operator.IN, codes);
}

}