views.py 文件源码

def form_valid(self, form):
        topic = self.get_object()
        old_tags = [tag.title for tag in topic.tags.all()]
        topic = form.save()
        tags_text = form.cleaned_data['tags']
        if tags_text:
            new_tags = tags_text.split(',')
            remove_tags = set(new_tags) - set(old_tags)
            for tag in new_tags:
                tag_slug = slugify(tag)
                if not Tags.objects.filter(slug=tag_slug).exists():
                    tag = Tags.objects.create(slug=tag_slug, title=tag)
                    topic.tags.add(tag)
                else:
                    tag = Tags.objects.filter(slug=tag_slug).first()
                    if tag.title in remove_tags:
                        topic.remove(tag)
                    else:
                        topic.tags.add(tag)
        topic.save()
        return JsonResponse({"error": False, "success_url": reverse('django_simple_forum:signup')})