def form_valid(self, form):
queue = form.save(commit=False)
if is_queueing_possible(queue.book_copy, queue.borrower):
messages.add_message(
self.request,
messages.ERROR,
_("You are already waiting for this book. Delete your previous demand before doing a new one!"),
)
else:
queue.save()
messages.add_message(
self.request, messages.SUCCESS, _("You have been successfully added to the queue for this book!")
)
return redirect("book_detail", book_id=queue.book_copy.book.id)
def can_queue(book_copy, user):
return not is_queueing_possible(book_copy,user)
