/Python/Validate delete inline formset django

Validate delete inline formset django

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.")

Source: stackoverflow.com

Similar codes

0 vote160 views1 answer
Django model make the field caseinsensitive
Python Django
0 vote118 views2 answers
Python combine two lists into matrix
Python
0 vote66 views0 answer
Python
1 vote138 views1 answer
How to filter queryset with foreign key in django
Python Django
0 vote129 views2 answers
Commentaire python
Python
77 votes105 views6 answers
Reverse a string python
Python
8 votes104 views2 answers
Jupyter read excel
Python
0 vote100 views1 answer
Combine two dictionary adding values for common keys
Python
2 votes127 views1 answer
Python sort two key
Python
3 votes106 views3 answers
Spacex
Python