gistfile1.txt

require 'sequel'
require 'active_record'

DB = Sequel.connect('postgres://localhost/tanga_dev')
puts DB[:users].count
ActiveRecord::Base.connection.instance_variable_set(:@connection, DB.synchronize{|c| c})
puts ActiveRecord::Base.connection.select_one('select count(*) from users')


# results in
10
/usr/local/stow/ruby-2.1.1-gh-2014.3.18/lib/ruby/gems/2.1.0/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:546:in `retrieve_connection': ActiveRecord::ConnectionNotEstablished (ActiveRecord::ConnectionNotEstablished)
	from /usr/local/stow/ruby-2.1.1-gh-2014.3.18/lib/ruby/gems/2.1.0/gems/activerecord-4.0.4/lib/active_record/connection_handling.rb:79:in `retrieve_connection'
	from /usr/local/stow/ruby-2.1.1-gh-2014.3.18/lib/ruby/gems/2.1.0/gems/activerecord-4.0.4/lib/active_record/connection_handling.rb:53:in `connection'
	from /tmp/t.rb:7:in `<main>'