Error !

TypeError: 'NoneType' object is not iterable

""" ).fetchone() # return dict(res) data = dict(res) add_cache( cache_key, json.dumps(data, default=datetime_serializer), 600 ) else: data = json.loads(data)
/opt/source/mscn-site/./mscnsite/service/changelog.py, line 145:
data = dict(res)
/opt/source/mscn-site/./mscnsite/views/changelog.py, line 63:
change_log = get_change_log_detail(slug, lang)