How do you do this??

transaction_example.rb

# So, we want to wrap a block of code in a transaction, and if the transaction
# fails, we'd like to take another action that also uses the database. But how?

# Example #1 - Not possible
success = false
ActiveRecord::Base.transaction do
  success = some_method

  if success
    # do something that gets rolled back
  else
    # do something that doesn't get rolled back
  end
end

# Example #2 - Not reliable
success = false
ActiveRecord::Base.transaction do
  # Say this succeeds
  success = some_other_crazy_db_operation

  # But this throws an error, causing a rollback
  some_crazy_db_operation
end

if !success
  # This does not get executed, even though the rollback occured,
  # because `success` evaluated to true before the rollback was raised
end