Rails Scaffold sample

ardb/activerecord.log

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+# Logfile created on Mon May 04 02:09:40 -07:00 2009 by /
+Migrating to CreatePeople (20090423112611)

ardb/app.rb

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+require 'person'
+
+puts "Loading .NET Libraries #{Time.now}"
+require 'mscorlib'
+require 'system'
+require 'System.Drawing'
+require 'System.Windows.Forms'
+
+include System
+include System::Drawing
+include System::Windows::Forms
+include System::ComponentModel
+
+puts "Starting app #{Time.now}"
+
+require 'c:/dev/repl'
+
+class MyForm < Form # System::Windows::Forms
+  def initialize
+    @binding_src = BindingSource.new
+    @datagrid = DataGridView.new
+    self.controls.add @datagrid
+    @datagrid.dock = DockStyle.top;
+    self.size = Size.new 800, 200
+    self.load do |s,e|
+      @customer_list = BindingList.of(Person).new
+
+      # Make sure all fields are loaded by calling
+      # one field on each record
+      Person.all.each{|pe| pe.age }
+
+      Person.all.each do |pe|
+        @customer_list.add pe
+      end rescue nil # Note sure why rescue is needed
+
+      @binding_src.data_source = @customer_list
+      @datagrid.data_source = @binding_src
+    end
+  end
+end
+
+t = Thread.new do
+  Application.enable_visual_styles
+  Application.run MyForm.new
+end
+
+repl binding

ardb/ardb.rb

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+require 'event' # defines RubyEvent
+
+require 'mscorlib'
+require 'system'
+
+include System::ComponentModel
+
+# For use in a ActiveRecord model, to databind it's attributes.
+module ActiveRecord::AttributeChangeNotifier
+  include INotifyPropertyChanged
+
+  # required by INotifyPropertyChange
+  def add_PropertyChanged handler
+    @attr_change ||= RubyEvent.new
+    repl binding, 'AddPropertyChanged'
+    @attr_change.add handler
+  end
+
+  # required by INotifyPropertyChange
+  def remove_PropertyChanged handler
+    @attr_change.remove handler if @attr_change
+  end
+
+  # Executed before ActiveRecord::Base#save
+  def before_save
+    if self.changed?
+      @model_changes = self.changes.clone
+    end
+    true
+  end
+
+  # Executed after ActiveRecord::Base#save
+  def after_save
+    repl binding, 'after_save'
+    @model_changes.each do |field, (oldval, newval)|
+      @attr_change.caller.call(field, oldval, newval) if @attr_change
+    end
+    @model_changes = []
+  end
+end

ardb/arinit.rb

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+puts "Loading rubygems #{Time.now}"
+require 'rubygems'
+
+puts "Loading activerecord #{Time.now}"
+require 'activerecord'
+
+puts "Connecting to database #{Time.now}"
+ActiveRecord::Base.establish_connection(
+  :adapter => "mssql",
+  :host    => "JIMMYSCH-GEMINI\\SQLEXPRESS",
+  :database => "ardb2",
+  :integrated_security => true
+)
+
+ActiveRecord::Base.logger = Logger.new("activerecord.log")

ardb/console.rb

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+require 'person'
+require 'irb'
+IRB.start

ardb/event.rb

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+# CLR event-like functionality for Ruby. 
+# 
+# >>> foo_event, on_foo_event = RubyEvent.build
+# >>> handler = foo.add { puts "foo event fired" }
+# >>> # or 
+# >>> def another
+# >>>   puts "foo event fired again"
+# >>> end
+# >>> foo.add method(:another)
+# >>> on_foo_event.call
+# foo event fired
+# foo event fired again
+# => nil
+class RubyEvent
+
+  # List of event handlers of type Proc
+  attr_reader :handlers
+
+  # Triggers the event; Proc which calls all handlers
+  attr_reader :caller
+
+  def initialize
+    @handlers = []
+    @caller ||= lambda do |*args|
+      @handlers.each { |h| h.call(*args) }
+      nil
+    end
+  end
+
+  def add(event = nil, &block)
+    event = block if event.nil? && block_given?
+    if event.kind_of?(RubyEvent)
+      @handlers.concat event.handlers
+    else
+      raise TypeError, "event handler must respond to call" unless event.respond_to?(:call)
+      @handlers << event
+    end
+    event
+  end
+end

ardb/migrate.rb

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+require 'arinit'
+puts "Migrating database #{Time.now}"
+ActiveRecord::Migrator.migrate "migrations"

ardb/migrations/20090423112611_create_people.rb

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+class CreatePeople < ActiveRecord::Migration
+  def self.up
+    create_table :people do |t|
+      t.string :first_name
+      t.string :last_name
+
+      t.integer :age
+
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :people
+  end
+end

ardb/person.rb

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+require 'arinit'
+require 'ardb'
+
+# ActiveRecord Person model, to be databinded with
+class Person < ActiveRecord::Base
+  include ActiveRecord::AttributeChangeNotifier
+end