from django import forms from lot.models import Lot class LotsForm(forms.Form): lots = forms.ModelMultipleChoiceField( queryset=Lot.objects.all(), widget=forms.CheckboxSelectMultiple, ) def clean(self): self._lots = self.cleaned_data.get("lots") return self._lots def save(self, commit=True): if not commit: return for dev in self.devices: for lot in self._lots: lot.add(dev.id) return def remove(self): for dev in self.devices: for lot in self._lots: lot.remove(dev.id) return