Is there a facility in Cayenne to create an expression that would compare a
property of one object against another property (maybe via a relationship path
rooted at the same object) rather than against a scalar value?
I’m trying to port over some old EOF code and we used to have a
EOKeyComparisonQualifier which would allow you to create a qualifier to compare
a property’s value with that of another property (or property key path).
For example, given a model consisting of employees, where each employee can
have a relationship to a manager and each employee has a salary property, you
could use a key comparison qualifier to find those employees that are making
more than their manager:
salary > manager.salary
I’ve looked in ExpressionFactory and through some of the source, but to me it
looks like all comparison nodes in an expression operate on a key and a scalar.
Am I missing something?
Thanks for any help or pointers,
F
--
Faizel Dakri
