MongoDB with Rails Getting Started

There are a few documents in Rails website and MongoDb website. Unfortunately they are out of date. Recently I’ve set up a new Rails project with MongoDb. I’ve used following steps:

• Install MongoDb  http://www.mongodb.org/display/DOCS/Quickstart
• Install all MogoDb related Gems  http://www.mongodb.org/display/DOCS/Ruby+Language+Center
• install MongoMapper  http://mongomapper.com/
• Either Create new Rails project using the template 

o    rails project_name -m "http://gist.github.com/219223.txt"

• Or configure your project to use MongoDb instead of default active record. This is an update of earlier post in MongoDb website(  http://www.mongodb.org/display/DOCS/Rails+-+Getting+Started) 

o    Save the following to config/database.rb file

MongoMapper.database = "db_name-#{Rails.env}"

Replace the db_name with your database name.

o    Remove everything from config/database.yml file. This file should be empty.

o    In config/application.rb file replace

require 'rails/all' with following four require statements.

 require "action_controller/railtie"

 require "action_mailer/railtie"

 require "active_resource/railtie"

 require "rails/test_unit/railtie"

o    In config/application.rb file , in the Application class add following line

 config.gem 'mongo_mapper'

o    From environments/development.rb ,  environments/production.rb and  environments/test.rb file remove all reference to active_record

o    Add following entries to the gemfile

gem 'bson_ext'

gem 'mongo_mapper'

o    From test/test_helper.rb file remove  

fixtures :all