def update_db_2(self, item, _id, _desc):
"""
Updates database with _desc information. If success _desc is cleared
- :param item:
- :param _id:
+ :param item: collection
+ :param _id: the _id to use in the query filter
:param _desc: dictionary with the content to update. Keys are dot separated keys for
:return: None. Exception is raised on error
"""