Question

is it possible to use 2 types of database in a Rails application?

I am using 2 databases – Postgres to store data which might not change much, and MongoDB
to store data which change dynamically.

is this valid approach? and is it possible to connect between these 2 databases and operate
in a single Rails application?

Please correct, if i am wrong.

regards,
Balan

Answer 1

Found solution :

We can use mongoid gem to achieve this.

Steps to install

1) Install mongoid by adding "gem mongoid" in Gemfile and running bundle command

2) Generate mongoid configuration by typing "rails g mongoid:config", this will create a
config file mongoid.yml near database.yml file, you can add the configuration to Mongo server
in this file.

Note : After adding Mongoid, all the models created will be created for MongoDB by default, you can specify --orm option to generate Models for Postgres.