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Django form validation not triggering for custom field type

👀 Views: 92 đŸ’Ŧ Answers: 1 📅 Created: 2025-09-06
django forms validation Python

I'm updating my dependencies and I've looked through the documentation and I'm still confused about I'm relatively new to this, so bear with me... I'm stuck on something that should probably be simple..... I've been banging my head against this for hours. Currently developing a Django application that includes a custom form field for handling a specific data type (let's say `IPAddressField`). I created a custom validator to ensure the input meets certain criteria, but for some reason, the validation isn't being triggered when the form is submitted. Here's a snippet of the form class I'm using: ```python from django import forms from django.core.exceptions import ValidationError class CustomIPAddressField(forms.CharField): def validate(self, value): super().validate(value) if not self.custom_validation(value): raise ValidationError('Invalid IP address format.') def custom_validation(self, value): # Example: Check if the IP is valid return value.count('.') == 3 class MyForm(forms.Form): ip_address = CustomIPAddressField(required=True) ``` When I try to submit the form with an invalid IP address, the `validate` method of `CustomIPAddressField` doesn't seem to be called, and I just get the default Django form error message. I've also tried overriding the `clean` method of the form, but that seems to just bypass my custom validation logic entirely. The `MyForm` instance looks like this when I handle a POST request: ```python if request.method == 'POST': form = MyForm(request.POST) if form.is_valid(): # Process form data else: # The form is not valid; check errors ``` I would expect the custom validation in `validate` to work, but I'm not seeing any validation errors when I input an invalid address. I've checked the Django documentation, and I feel like I'm missing something fundamental here. Can anyone point me in the right direction or suggest what might be going wrong? My development environment is Windows. Any ideas what could be causing this? My development environment is Windows. How would you solve this? This is part of a larger microservice I'm building. I'm developing on Linux with Python. I'd be grateful for any help. This issue appeared after updating to Python LTS. Cheers for any assistance! Hoping someone can shed some light on this.