How do I use forms and validation in Django?

How do I use forms and validation in Django?

In Django, you can use the forms module to create forms and handle validation easily. Would you like a code example?

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

Sure! Here's a basic example:

from django import forms

class ContactForm(forms.Form):
    name = forms.CharField(max_length=100)
    email = forms.EmailField()
    message = forms.CharField(widget=forms.Textarea)

    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.