Method clean

tests/forms_tests/tests/test_formsets.py:57–64

(self)

class BaseFavoriteDrinksFormSet(BaseFormSet):
    def clean(self):
        seen_drinks = []

        for drink in self.cleaned_data:
            if drink["name"] in seen_drinks:
                raise ValidationError("You may only specify a drink once.")

            seen_drinks.append(drink["name"])


# A FormSet that takes a list of favorite drinks and raises an error if