What is the clean method in Django forms?

What is the clean method in Django forms?

The clean method in Django forms is used to validate and clean data before saving it. It allows you to define custom validation logic.

Can you give me an example of how to use the clean method?

Sure! You can override the clean method in your form class like this:

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

    def clean_name(self):
        name = self.cleaned_data.get('name')
        if not name.isalpha():
            raise forms.ValidationError('Name must contain only letters.')
        return name

What happens if the clean method raises a ValidationError?

If the clean method raises a ValidationError, the form will not be valid, and the error message will be displayed to the user.

Can I use the clean method to validate multiple fields?

Yes, you can override the clean method of the form to validate multiple fields together. This is useful for interdependent fields.