MongoDB is an opensource document-oriented database in the vein of CouchDB. It’s been a while since I wanted to try this kind of database on a Rails project. After reading this nice tutorial today I decided to take some time to create a sample Rails 3 app and put it on github.
I chose to use MongoMapper, a ruby object mapper for Mongo. MongoMapper uses ActiveModel and let you interact with a MongoDB database in a very ActiveRecord way.
Hope this sample app will help you getting started with MongoDB!
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This article is by Frank from rubyfleebie.com.