How can I clean data in Django forms?

How can I clean data in Django forms?

In Django, you can clean data in forms by overriding the clean() method or using field-specific clean methods.

Can you give me an example of overriding the clean method?

Sure! You can override the clean() method like this:

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

    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 if I want to clean multiple fields?

You can still use the clean() method to validate multiple fields together. Here's an example:

def clean(self):
    cleaned_data = super().clean()
    password = cleaned_data.get('password')
    confirm_password = cleaned_data.get('confirm_password')
    if password != confirm_password:
        raise forms.ValidationError('Passwords do not match.')