Validating adult age does not work

Using Django Forms & APIs
1

Hello. I am trying to validate the adult age, but the error message does not show. In the validator I calculate the person’s age and check if they’re adult.

# realestate\realestate\validators.py
class AdultValidator(BaseValidator):
    def __init__(self, limit_value=18, message=None):
        super().__init__(limit_value, message)

    def __call__(self, value: date):
        today = date.today()
        print(value)
        age = today.year - value.year - ((today.month, today.day) < (value.month, value.day))

        if age < self.limit_value:
            raise ValidationError(_("birth_date.adult").format(_("birth_date")))

The use in the form.

class RegisterForm(UserCreationForm):    
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # 2 Input validation & sanitization
        self.fields["password1"].error_messages = {"required": _("field.required").format(field=_("password1"))}
        self.fields["password2"].error_messages = {"required": _("field.required").format(field=_("password2"))}
        self.fields["email"].validators = [EmailValidator(message=_("email.email"))]
        self.fields["phone"].validators = [RegexValidator(regex=r"^\+381 \d{2} \d{6,7}$", message=_("phone.regex"))]
        self.fields["first_name"].validators = [AlphaValidator(message=_("field.alpha").format(field=_("first_name")))]
        self.fields["last_name"].validators = [AlphaValidator(message=_("field.alpha").format(field=_("last_name")))]
        self.fields["birth_date"].validators = [AdultValidator]

No error message for the birth date (Datum rođenja) is shown.

image
image416×634 7.62 KB

2

How are you rendering your form? (What is the template you are using?)

3

Django Templates. Validation error for required shows, but not for adult check.

<div class="row">
  <div class="col-md-6 col-lg-4">
    {# 4 Authentication & authorization #}
    {# Form #}
    <form class="border border-secondary-subtle rounded-3 p-3 mb-3" action="{% url 'register' %}" method="post" novalidate>
      <p class="mb-3">Imaš nalog? <a class="fw-bold" href="{% url 'login' %}">Prijavi se</a></p>

      <!-- ... -->
      <div class="row mb-3">
        <label class="col-sm-4 col-form-label" for="birth_date">Datum rođenja</label>
        <div class="col-sm-8">
          {{ form.birth_date }}
          {% if form.birth_date.errors %}
            <span class="form-text text-danger">{{ form.birth_date.errors.0 }}</span>
          {% endif %}
        </div>
      </div>

      <input class="btn btn-primary fw-semibold" type="submit" value="Registruj se">
    </form>
  </div>
</div>
4

You need to supply an instance of the validator class, not the validator class itself.
i.e. AdultValidator() instead of AdultValidator

5

It worked. Thank you.