A PostgreSQL database is a robust and flexible choice for your Ruby on Rails application. In these tutorials, you will set up a Ruby on Rails development environment connected to a PostgreSQL database. You will install and configure PostgreSQL, and then test your setup by creating a Rails application that uses PostgreSQL as its database server.
How To Use PostgreSQL with Your Ruby on Rails Application on CentOS 7
How To Use PostgreSQL with Your Ruby on Rails Application on macOS
How To Use PostgreSQL with Your Ruby on Rails Application on Ubuntu 20.04
How To Use PostgreSQL with Your Ruby on Rails Application on Ubuntu 18.04
How To Use PostgreSQL with Your Ruby on Rails Application on Ubuntu 14.04