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

Have found most short example in Rails codebase at activerecord/test/support/connection_helper.rb and slightly adapted:

def with_another_db(another_db_config)
  original_connection = ActiveRecord::Base.remove_connection
  ActiveRecord::Base.establish_connection(another_db_config)
  yield
ensure
  ActiveRecord::Base.establish_connection(original_connection)
end

Usage (given that you have another_db: section in your database.yml):

with_another_db(ActiveRecord::Base.configurations['another_db']) do
    ActiveRecord::Base.connection.execute("SELECT 'Look ma, I have changed DB!';")
end