CODEWITHSUNDEEP
djangodjango-formswagtail
inostia
inostia

Reputation: 8023

Custom validators on Wagtail fields

I have a TextField I would like to add a min_length to.

According to the Django docs there are built in validators you can use to enforce this (https://docs.djangoproject.com/en/1.11/ref/validators/#minlengthvalidator).

I tried to add this to my model with this code:

class MyPage(Page):
    ...
    introduction = models.TextField(
        null=True,
        blank=False,
        validators=[MinLengthValidator(240, message="Must be at least 240 chars.")]

When publishing this page with a value lower than 240, however, I did not get the expected validation error, but instead hit a TypeError: unorderable types: str() < int().

Is there a way to have a min_length on a TextField?

Upvotes: 0

Views: 1701

Answers (1)

binpy
binpy

Reputation: 4194

If default MinLengthValidator isn't work for you, I suggest you to crate a custom validator like below:

from django.core.validators import ValidationError

def max_length_validator(value):
    if len(value) < 240:
        raise ValidationError("Must be at least 240 chars.")


class MyPage(Page):
    introduction = models.TextField(
        blank=False, validators=[max_length_validator])

Upvotes: 1

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