ManyToOne and OneToOne Relations of Objects passed as Action Argument are loaded automatically
All ManyToOne and OneToOne Relations of Objects passed as Action Argument are loaded automatically by the Validator (circumventing the lazy loading).
This results in several querries even if no relations are accessed in the action.
I think robert mentioned that validation will be at some point totally skipped for safe methods which will resolve this to some extend. But even for unsafe methods it may be the case that objects from database which are not modified should not be validated.