Django formset with custom model manager

django_formset_custom_model_manager.txt

from django.forms import BaseModelFormSet

from app.companies.models import CompanyBranchPaymentOptions


class PaymentsBaseFormSet(BaseModelFormSet):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.__full_id_queryset = CompanyBranchPaymentOptions.objects.get_full_queryset()

    def add_fields(self, form, index):
        # When Django adds the "id" ModelChoicefield to form fields/which marks if it is CREATE or UPDATE operation/,
        # it uses the get_queryset method of the model manager.
        # When that method is overwritten to skip some items /like active=False/ on one hand
        # and if the form itself include those skipped items on the other hand,
        # this leads to validation error since the provided "id" is not on the ModelChoicefield queryset
        # This hook method is perfect to override the default queryset to include missing items.
        # Override this after form is ready and replace the original QS with the one that includes missing items.
        super().add_fields(form=form, index=index)
        form.fields['id'].queryset = self.__full_id_queryset