MongoDB Integration with RAILS

This blog post lists step by step instructions for integrating MongoDB in RAILS Application . STEP 1:To create application with Mongo db you need to skip active record.Type command

rails new app_name -–skip-active-record 

STEP 2:Before bundle install make sure that you have included following gems in your gemfile.

gem 'mongoid'
gem 'bson_ext'
run bundle intsall

IF any problem occurs during bundle installation remember dependencies of mongoid should be of same version.Otherwise it will give error while installing bundle.Now you can see that dependencies of gem 'mongoid' are of same version in snapshot. gem 'mongo' '1.6' gem 'bson' '1.6' gem 'bson_ext' '1.6' STEP 3:Now run the server check whether connection established with mongoid. Mongoid.yml is not found. STEP 4:Let's create mongoid.yml file .

rails g mongoid:config

STEP 5:Let's generate scaffold,here we dont need to mention skip active record though it is already mentioned. Type command

rails g scaffold article name:string content:text 

When you will check your model you will find instead of

 class Article<ActiveRecord::Base
 end
class Article
          include Mongoid::Document
end

Now instead of generating migration we will write fields in model itself.

class Article
          include Mongoid::Document
field :name,:type => String
end

No need of migration file in mongo db. Now Start the Server . STEP 5:Validation and Association Validation is same as it was in ActiveRecord but Associations is slightly different.Some new association are introduced.

embeds_many and embedded_in,embeds_one and embedded_in,references_many and referenced_in,references_one and referenced_in and associations used in active record.

Post Comments And Suggestions !!! Thanks to Santosh for writing this post .