def articles_append_tag(req, id, tag_id):
check_login(req)
match_right(req, module_rights)
check_token(req, req.form.get('token'), uri='/admin/articles/%d' % id)
article = Article(id)
if not article.append_tag(req, tag_id):
return send_json(req, {'reason': 'integrity_error'})
req.content_type = 'application/json'
return '{}'
