@sescandell what if you have no validation constraints on your form.. will an empty (just created) form pass `isValid`?

is this scenario possible:
1. user clicks `create`
2. controller creates new form
3. at this line, form is valid (becouse no validation constraints have been set) 
4. so form is saved and user redirected to edit (becouse, no `save-and-add` or `save-and-list` is found)
5. but the newly created form does not have a PK attribute, so the redirect fails