Any hint on the above doubt will work fine.
On Wednesday, August 5, 2020 at 12:32:23 AM UTC+5:30, NIKHIL RAJGARHIA
wrote:
>
> Hi All,
>
> I am unable to understand the below logic for '*BaseInlineFormSet*' and '
> *inlineformset_factory*'.
>
> 1. What is the use of 'formset' in 'inlineformset_factory'?
> 2. What is the use of validation inside 'BaseInlineFormSet'? How it works?
> I haven't seen any implementation like this validation in normal forms.
>
> As I have only worked with general forms, I was exploring on 'formset',
> but, couldn't understand this piece of example. I know 'formset' is used to
> create multiple forms on the same page.
>
> AnswerFormSet = *inlineformset_factory*( #this will be an instance of the
> form
> Question, # parent model
> Answer, # base model or child model
> formset=*BaseAnswerInlineFormSet*,
> fields=('text', 'is_correct'),
> min_num=2,
> validate_min=True,
> max_num=10,
> validate_max=True
> )
>
> class *BaseAnswerInlineFormSet*(forms.BaseInlineFormSet):
> def clean(self):
> super().clean()
>
> has_one_correct_answer = False
> for form in self.forms:
> if not form.cleaned_data.get('DELETE', False):
> if form.cleaned_data.get('is_correct', False):
> has_one_correct_answer = True
> break
>
> if not has_one_correct_answer:
> raise ValidationError('Mark at least one answer as correct.',
> code='no_correct_answer')
>
> Thank you in advance.
>
>
>
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