How do I validate user input in Django?

How do I validate user input in Django?

In Django, you can validate user input using forms and model validation. Would you like to see an example?

Yes, please provide an example of a form validation.

Sure! You can create a form by subclassing forms.Form and define your 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 happens if the validation fails?

If validation fails, Django will raise a ValidationError, and the form will not be saved. You can display the errors in your template.