I have a function for filling in many fields automatically with an api.onchange() decorator.

@api.onchange('nursery_morning', 'nursery_evening', 'responsible_partner')
def retrieve_responsible_nursery(self):
    if self.nursery_morning or self.nursery_evening:
        if self.responsible_partner:
            if not self.resp_civility1 and not self.resp_name1 and not self.resp_cp1 and not self.resp_num1 \
                    and not self.resp_address1 and not self.resp_town1 \
                    and not self.resp_phone1 and not self.resp_phonemobile1:
                self.resp_civility1 = self.responsible_partner.title.name
                self.resp_name1 = self.responsible_partner.name
                self.resp_cp1 = self.responsible_partner.zip_id.name
                self.resp_num1 = self.responsible_partner.street_number_id.name
                self.resp_address1 = self.responsible_partner.street_id.name
                self.resp_town1 = self.responsible_partner.city_id.name
                self.resp_phone1 = self.responsible_partner.phone
                self.resp_phonemobile1 = self.responsible_partner.mobile

This function works, but I do not want the fields to change until the fields are saved in the database and not before.

Currently, the fields do not change once one of the fields listed are filled but not saved in database