Re: [CORRECTION Lengkap] Pembuktian Transaction Support

Dear All:

I have done my test for 2 actions do simultaneously for the same command. Here is my approvement.

------------------------
Window DOS 1
------------------------

F:\ruby\tiesto> ruby test/unit/item_test.rb
Loaded suite test/unit/item_test
Started
.
Finished in 42.078 seconds.

1 tests, 0 assertions, 0 failures, 0 errors

------------------------
Windows DOS 2
------------------------

F:\ruby\tiesto>ruby test/unit/barang_ terpesan_ test.rb
Loaded suite test/unit/barang_terpesan_ test
Started
.
Finished in 42.125 seconds.

1 tests, 0 assertions, 0 failures, 0 errors

------------ --------- --------- -----
SCRIPT di barang_terpesan_test.rb
------------ --------- --------- -----

require File.dirname( __FILE__) + '/../test_helper'

class BarangTerpesanTest < Test::Unit:: TestCase
fixtures :barang_terpesans

def test_what
barang = BarangTerpesan. find(:first)

BarangTerpesan. transaction do
barang.proses_ modifikasi
end
end

end

------------ --------- --------- --------- -------
SCRIPT di BarangTerpesan. rb (Active Record)
------------ --------- --------- --------- -------
class BarangTerpesan < ActiveRecord: :Base

def proses_modifikasi

#dikasih delay
for x in 1..100000000
end

update_attributes( :jumlah => jumlah-1)

end

------------ --------- ----
KONDISI TABLE SEBELUM ACTION
------------ --------- ----

------------ --------- -
ID | BARANG | JUMLAH |
------------ --------- -
1 | ABC01 | 10 |
------------ --------- -

Setelah kedua windows itu dijalankan, hasilnya :

------------ --------- --------- --------- --------- --
KONDISI TABLE SETELAH 2 EKSEKUSI BERSAMAAN
------------ --------- --------- --------- --------- --

------------ --------- -
ID | BARANG | JUMLAH |
------------ --------- -
1 | ABC01 | 9 |
------------ --------- -

Ini tidak sesuai dengan kaidah database seharusnya 10 - 1 -1 = 8, bukan 9. Padahal saya sudah menaro
BarangTerpesan. transaction.

Gimana teman-teman ada solusi atau saran?

Thank You
Reinhart
http://teapoci. blogspot. com

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------------------------------------

ID-Ruby
Berdiskusi dan belajar bersama Bahasa Pemrograman Ruby, termasuk segala varian Ruby (JRuby, Rubinius,
IronRuby, XRuby), dan program yang dibuat dengan Ruby (Ruby on Rails, JRuby on Rails, Merb)

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