How can I validate fields in Django forms?

How can I validate fields in Django forms?

In Django, you can validate fields in forms by using the clean() method or by defining field-specific validators.

Can you give me an example of using the clean() method?

Sure! You can override the clean() method in your form class to add custom validation logic. For example:

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 about using field-specific validators?

You can use built-in validators or create your own. For example, to ensure a field is an email, you can use:

from django.core.validators import EmailValidator

class MyForm(forms.Form):
    email = forms.EmailField(validators=[EmailValidator()])