How can I implement input validation in Django?

How can I implement input validation in Django?

You can implement input validation in Django using forms and model validation. Would you like to see an example?

Yes, please provide an example of a form with validation.

Sure! You can create a form by subclassing forms.Form and adding fields with validation rules. For instance:

from django import forms

class MyForm(forms.Form):
    name = forms.CharField(max_length=100)
    email = forms.EmailField()

    def clean_email(self):
        email = self.cleaned_data.get('email')
        if not email.endswith('@example.com'):
            raise forms.ValidationError('Email must be from example.com')
        return email

What if I want to validate a model instead?

For model validation, you can override the clean method in your model class. Here's an example:

from django.db import models

class MyModel(models.Model):
    name = models.CharField(max_length=100)
    email = models.EmailField()

    def clean(self):
        super().clean()
        if not self.email.endswith('@example.com'):
            raise ValidationError('Email must be from example.com')