forms.py 文件源码

def clean_expires_at(self):
        # Validate the expiration date
        expires_at = self.cleaned_data.get("expires_at", "")
        never_expires = self.cleaned_data.get("never_expires", "")
        current_tz = timezone.get_current_timezone()
        if never_expires:
            expires_at = None
            self.cleaned_data["expires_at"] = expires_at
        if expires_at:
            # Check if the expiration date is a past date
            if timezone.localtime(timezone.now(), current_tz) > expires_at:
                self.add_error('expires_at', _('The date must be on the future.'))
        if not expires_at and not never_expires:
            self.add_error('expires_at',
                           _('This field is required, unless box is set to '
                             'never expire.'))
        return expires_at