def _add_tags(obj, tags_str, creator, content_type_name):
for tag_name in tags_str.split(','):
tag_name = tag_name.strip()
# don't recreate the tag if it already exists
try:
t = Tag.objects.get(slug=slugify(tag_name))
except ObjectDoesNotExist as dne:
t = Tag()
t.name = tag_name[:99]
t.slug = slugify(tag_name)
t.save()
ti = TaggedItem()
ti.tag = t
ti.object_id = obj.id
ti.tag_creator = creator
ti.content_type = ContentType.objects.filter(name=content_type_name)[0]
ti.save()
