alexbilbie/codeigniter-mongodb-library — pull request #95 by toeh101 (2013-01-08 07:37:44+00:00)
Title: Update libraries/Mongo_db.php

If you delete_all with where_in() condition, the $this->wheres is an array. So you can't delete_all() with '$in' operator since '$in' need array, not MongoID instance.

I add the condition to fix bug.
It works.