def form_valid(self, form):
slotIds = form.cleaned_data['<STR_LIT>']<EOL>deleteSlot = form.cleaned_data.get('<STR_LIT>', False)<EOL>these_slots = InstructorAvailabilitySlot.objects.filter(id__in=slotIds)<EOL>if deleteSlot:<EOL><INDENT>these_slots.delete()<EOL><DEDENT>else:<EOL><INDENT>for this_slot in these_slots:<EOL><INDENT>this_slot.location = form.cleaned_data['<STR_LIT>']<EOL>this_slot.room = form.cleaned_data['<STR_LIT>']<EOL>this_slot.status = form.cleaned_data['<STR_LIT>']<EOL>this_slot.pricingTier = form.cleaned_data.get('<STR_LIT>')<EOL>this_slot.save()<EOL><DEDENT><DEDENT>return JsonResponse({'<STR_LIT>': True})<EOL>
Modify or delete the availability slot as requested and return success message.