Establish a connection to another database only in a block?

Question

In a rails application, I have this code in pure ruby :

class LinkCreator
  attr_accessor :animal

  def initialize(animal:)
    @animal = animal
  end

  de         


        

Answer 1

I use environment variables taken from Heroku's DATABASE_URL to connect to different databases:

class Database
  def self.development!
    ActiveRecord::Base.establish_connection(:development)
  end

  def self.production!
    ActiveRecord::Base.establish_connection(ENV['PRODUCTION_DATABASE'])
  end

  def self.staging!
    ActiveRecord::Base.establish_connection(ENV['STAGING_DATABASE'])
  end
end

e.g.:

Database.production!; puts User.all.map(&:name)
Database.staging!; puts User.all.map(&:name)