Each A class instance can have thousands of B class instances.
When I call a.validate(), log shows that all B instances which belongs to 'a' are loaded from DB! In my case it will take a long time.
I've tried this solution: a.validate(deepValidation:false), but no validation occurs on 'c' field in this case.
Is there a way to turn off cascading validation on specific association? Or to validate only new or modified instances?