answer, created = Answer.objects.get_or_create(participant=participant, assignment=assignment)
attachment, created = Attachment.objects.get_or_create(answer=answer, file_no=i)
form = AttachmentForm(
data=request.POST, files=request.FILES,
answer, created = Answer.objects.get_or_create(participant=participant, assignment=assignment)
attachment, created = Attachment.objects.get_or_create(answer=answer, file_no=i)
form = AttachmentForm(
data=request.POST, files=request.FILES,