account_example.rb

d = Accounting::Account.find(:first, :conditions => {:name => "Kasse"})
c = Accounting::Account.find(:first, :conditions => {:name => "Budget 1"})
record = Accounting::Record.new(:credit => c,
                                :debit => d,
                                :amount => 100)

record.description= "BüroPapier"
record.commit!()
 

accounting.tuml

package AutobahnERP::Accounting;

import UMLPrimitiveTypes;
primitive DateTime;

class Account
  attribute name : String;
  attribute number : Integer;
  attribute initial_balance : Integer;
  
  operation assets\? () : Boolean;
  operation liabilities\? () : Boolean;

  operation expense\? () : Boolean;
  operation income\? () : Boolean;
  
  operation credit_sum () : Integer;
  operation debit_sum () : Integer;
end;

class Record
  reference credit : Account;
  reference debit : Account;

  attribute description : String;
  attribute number : Integer;
  attribute amount : Integer;
  attribute time : DateTime;
  
  operation commit\! () ;
  operation committed\? () : Boolean;

  operation reversed () : Record;
end;

end.