Mongodb, mongoid on ruby on rails: Could not load database configuration. No such file - ["config/database.yml"]
If you're looking to have a rails app without active record (an app that doesn't use SQL), you may be surprized to find out that excluding "active_record/railtie" still does not remove active_record from the stack. So how do you remove active_record? This question is relevant when you convert or create a new rails app, that uses mongoid (mongodb) for its storage.