Ruby PostgreSQL tutorials [closed]

Answer 1

You only need to require the pg gem and establish the connection to the DB:

require 'pg'
# require 'active_record'  # uncomment for not Rails environment

ActiveRecord::Base.establish_connection(:adapter => "postgresql",
                                        :username => "username",
                                        :password => "password",
                                        :database => "database")

When you define models to inherit from ActiveRecord::Base they will use this database connection. Everything else should work like it does in Rails.