MongoDB Rails


Integrate MongoDB with Ruby on Rails

This quickstart guide will help you to integrate your Ruby on Rails application with MongoDB service on App42 PaaS.


Kontena – Kontena is a lightweight container that will run your apps and services in an isolated and secured manner. You can specify the power of the Kontena while setting up infra or creating services. One Kontena power specifies to 256 MB Memory and 128 MHz CPU.

Service – Services in the App42 PaaS are add-on components which are needed in an App. App42 PaaS supports multiple services like SQL databases, NoSQL databases and more.


To get going with App42 PaaS, below are few prerequisites that will allow you to use AppHQ – App42 PaaS Management Console as well as Command Line Client.

Configure MongoDB credentials into Ruby on Rails App

Once you have setup the Rails environment and created the MongoDB service, You need to configure the MongoDB credentials in your created Ruby on Rails application(config/mongoid.yml).

     database: < database name >                    # Database Name                    
       - < host >:< port >                          # VM Ip  and VM Port                            
     username: < user name >                        # User Name     
     password: < password >                         # Password
       consistency: :strong
       # In the test environment we lower the retries and retry interval to
       # low amounts for fast failures.
       max_retries: 1
       retry_interval: 0

You can also use our Sample Apps and extend it to suit your needs. Here is the link to Ruby on Rails MongoDB Sample App

Update Application

After doing all the modifications to your App, you need to update it on App42 PaaS to get the changes affected in your App running on App42 PaaS platform.

$ app42 update
Enter App Name: javademo
1: Binary
2: Source
Choose Upload Type [Binary]: 2

Updating Application... OK

Operation is in progress, Please wait...-
App deployed successfully.