preDqlSelect should check relation is LooselyCoupled to it's invoker, and not assume all LooselyCoupleable objects are.

[benlumley]

Hello .... Me again...

Thought of another bug.

Unlikely, but if someone has a schema with an object that has a loosely coupled relation, and another loosely coupleable object that is joined normally (like I say, unlikely, but people do crazy things), it's going to add the obj_type clause to the normal relation.

I think checking whether the field for the relation on the LooselyCouplable object should be a fix for this - will add it to the pull when I'm at home (unless I'm beaten to it).