Re: RoR vs PHP

Article View: pl.comp.lang.ruby

Article #834

#834

From: Jaroslaw Zabiello
Date: Wed, 02 Jan 2008 03:37

51 lines
2563 bytes

On Tue, 01 Jan 2008 19:45:20 -0000, Maciej Piechotka  
<uzytkownik2@gmail.com> wrote:

> 3. Cały czas twierdzę, że AR nie potrafi tego zrobić z pudełka.

Aby nie było, że tylko Sequel to potrafi. Masz tu implementację przykładu  
3 w Active Record. Pomijam tylko migracje tworzące tabelki.

require 'rubygems'
require 'active_record'

ActiveRecord::Base.establish_connection({
   :adapter => 'mysql',
   :database => 'test',
   :username => 'root',
   :password => ''
})

class Parent < ActiveRecord::Base
end

class Child1 < ActiveRecord::Base
   self.table_name = 'childs1'
   self.primary_key = 'parent_id'
   class << self
     def next_id
       maximum(:parent_id).to_i + 1
     end
   end
   before_save do
     begin
       Parent.find(Child1.next_id)
     rescue ActiveRecord::RecordNotFound
       raise 'Parent cannot assign more childs1 objects'
     end
   end
end

Parent.create :pole_parent => 'Alojzy'
Parent.find :all
# [#<Parent id: 6, pole_parent: "Alojzy">]
Child1.create :pole1 => 'Jas'
Child1.find :all
[#<Child1 parent_id: 1, pole1: "Jas">]

Child1.create :pole1 => 'Malgosia'
# => Parent cannot assign more childs1 objects

-- 
Jarosław Zabiełło
http://blog.zabiello.com

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Path: mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!news.gazeta.pl!not-for-mail
From: "Jaroslaw Zabiello" <abuse@tpnet.pl>
Newsgroups: pl.comp.lang.ruby
Subject: Re: RoR vs PHP
Date: Wed, 02 Jan 2008 03:37:18 -0000
Organization: "Portal Gazeta.pl -> http://www.gazeta.pl"
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