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On 3/30/2020 at 1:59 PM, Puppo said:

Works perfect! Thank you.

I someone can show how to make a override with this fix it would be great!

Create override/classes/form/CustomerFormatter.php

<?php
use Symfony\Component\Translation\TranslatorInterface;

class CustomerFormatter extends CustomerFormatterCore
{
    private $translator;
    private $language;

    //translator and language are private in parent class, override need
    public function __construct(
      TranslatorInterface $translator,
      Language $language
    ) {
      $this->translator = $translator;
      $this->language = $language;
        
      parent::__construct($translator,$language);
    }
    
    
  	public function getFormat()
    {
      $format = parent::getFormat();
      
      //override/add all customisations for fields
      $format['birthday'] = (new FormField())
        ->setName('birthday')
        ->setType('text')
        ->setLabel(
        $this->translator->trans(
          'Birthdate',
          [],
          'Shop.Forms.Labels'
        )
      )
        ->addAvailableValue('placeholder', Tools::getDateFormat())
        ->addAvailableValue(
        'comment',
        $this->translator->trans('(E.g.: %date_format%)', array('%date_format%' => Tools::formatDateStr('31 May 1970')), 'Shop.Forms.Help')
      )
        ->setRequired(true);

      //As addConstraints method is private we need to call the logic here. We don't need to iterate over all the fields again, just the changed ones.
      $constraints = Customer::$definition['fields'];
      $field = $format['birthday'];

      if (!empty($constraints[$field->getName()]['validate'])) {
        $field->addConstraint(
          $constraints[$field->getName()]['validate']
        );
      }

      return $format;
    }
}

If you need a value check like $ask_for_birthdate just override it like the __construct method:

private $ask_for_birthdate = true;

public function setAskForBirthdate($ask_for_birthdate)
{
  $this->ask_for_birthdate = $ask_for_birthdate;

  return parent::setAskForBirthdate($ask_for_birthdate);
}