Mongoid has a great option, where we can choose between using or not ObjectID like key.

But if we choose Mongoid.use_object_ids = true, when we made a find, we need allways cast our String to BSON::ObjectID.

I made a patch to avoid that. With it, if you define Mongoid.use_object_ids = true, you can find directly by String. You can see all in my branch fix-objectids on my repo http://github.com/shingara/mongoid/commits/fix-objectids

There are 3 commits to integrate I think,

• http://github.com/shingara/mongoid/commit/d74439aec0e4a7f3eb0953a55832499a689daced
• http://github.com/shingara/mongoid/commit/e184dc26c83802340715d2730524bb75b3f62cc1
• http://github.com/shingara/mongoid/commit/1de165d6aef3e7bab0076968f473cc690ec9cb9b