Why am I getting the error "db_name must be a string or symbol"?
I had the same problem with rails and solved it in this way :
The Problem lies in the different expectations of Mongoid and MongodbLogger concerning the structure of the mongoid.yml.Short : just add the database in addition on the upper level :
development: sessions: default: database: apollo_development <<<< for the rest hosts: - localhost:27017 options: consistency: :strong database: apollo_development <<<<main level for logger .... more stuff for the loggerThe advantage is that you can use a database for your data and another for the logger.Technical there are two independant systems using the yml : the logger and MongoId.