gistfile1.rb

foo, bar = nil, nil

begin
  transaction do
    foo = FooClass.create!(:blah => 'blah')
    bar = BarClass.create!(:bleh => 'bleh')
  
    return foo, bar, 'success'
  end
rescue ActiveRecord::RecordInvalid => e
  return foo, bar, 'error'
end