Swap NodeJs and CouchDb with Rails and MongoDb

Reason why leaving **NodeJs**:
**NodeJs** is great for i/o stuff. Using streams, operating on files, binding to libraries and writing very fast code and libraries and reaching your goal in a very short period. Unfortunately the downside of these benefits are problems on maintaining the project especially when you are trying to work on more complicated data structures (relational data).
In this I believe **Rails** to be prior.

Reasons why leaving **CouchDb**:
In the first time I tried to use **CouchDB** in my **Rails** setup. Unfortunately there is much better support and a much more active community on **MongoDB** regarding the rails binding. Also you have a better management of handling different document types.