def delete_data(self, parent_key, sub_key, clear_from_db=True):
"""
Used to delete record from db if clear_from_db=True, also
clens up from cache.
"""
num_records = 0
if clear_from_db:
num_records = Directory.objects(id=sub_key).delete()
key = "%s__%s" % (parent_key, sub_key)
self.delete(key)
return num_records
