gistfile1.rb

def fuck_my_transaction
  begin
    ActiveRecord::Base.connection.begin_db_transaction
    # Raise any error except an AR::StatementInvalid, such as an ActiveRecord::Rollback,
    # which is generally used to signal a rollback condition
    raise ActiveRecord::Rollback.new("Fucking your transaction.")
  rescue ActiveRecord::StatementInvalid
    puts "Rescued, rolling back..."
    ActiveRecord::Base.connection.rollback_db_transaction
  end
ensure
  puts "Outside block; the connection is still in a transaction if this is 1: #{ActiveRecord::Base.connection.instance_variable_get(:@nested_transaction_count)}"
end