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validate delete inline formset django

tuan.luu answered on November 27, 2020 Popularity 3/10 Helpfulness 1/10

answer validate delete inline formset django

validate delete inline formset django

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class RequiredImageInlineFormset(forms.models.BaseInlineFormSet):
    """ Makes inline fields required """

    def clean(self):
        # get forms that actually have valid data
        count = 0
        delete_checked = 0
        for form in self.forms:
            try:
                if form.cleaned_data:
                    count += 1
                    if form.cleaned_data['DELETE']:
                        delete_checked += 1
                    if not form.cleaned_data['DELETE']:
                        delete_checked -= 1
            except AttributeError:
                # annoyingly, if a subform is invalid Django explicity raises
                # an AttributeError for cleaned_data
                pass

        # Case no images uploaded
        if count < 1:
            raise forms.ValidationError(
                'At least one image is required.')

        # Case one image added and another deleted
        if delete_checked > 0 and ProductImage.objects.filter(product=self.instance).count() == 1:
            raise forms.ValidationError(
                "At least one image is required.")

Popularity 3/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: django inline-formset python

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