I’ve finally got it working 
, thanks a lot @SamS and @rajp4690, without your help probably i would have had to go back to 1.10 while an example of this appeared in the documentation or in a forum response, i was stuck in this part for almost two weeks, at the end mi FormValidationAction looks like this (omitting the validation methods):
Probably theres a best way to achive this behavior in a form but this works for me. 