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@myobie
Created Jul 17, 2009
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require "rubygems"
require "dm-core"
require "dm-validations"
DataMapper.setup(:default, 'sqlite3://:memory:')
class History
include DataMapper::Resource
property :id, Serial
belongs_to :ticket
def save(*args)
STDOUT.puts "%%%%%%% saving History"
super
end
end
class Ticket
include DataMapper::Resource
property :id, Serial
property :title, String
property :body, Text
has 1, :history
validates_present :title, :body
before :create, :create_a_history
before :save, :b_s
after :save, :a_s
def save(*args)
STDOUT.puts "%%%%%%% saving Ticket"
super # !> method redefined; discarding old to_datetime
end
private
def create_a_history
STDOUT.puts "%%%%%%% creating a history"
self.history = History.create
end
def b_s # !> private attribute?
STDOUT.puts "$$$$ before :save"
end
def a_s
STDOUT.puts "$$$$ after :save" # !> method redefined; discarding old prepare
end
end
DataMapper.auto_migrate!
t = Ticket.create :title => "Hello", :body => "Hello as well"
puts "\n\n\n--- Now to save\n"
t.reload
t.save # => true
puts "\n\n\n--- Now to fetch the same one and watch it act differently\n"
t = Ticket.first
t.save # !> instance variable @log not initialized
puts "\n\n\n--- Now load the history and save again\n"
t.history # => #<History @id=1 @ticket_id=1>
t.save
# >> %%%%%%% saving Ticket
# >> %%%%%%% creating a history
# >> %%%%%%% saving History
# >> $$$$ before :save
# >> $$$$ after :save
# >> %%%%%%% saving History
# >> $$$$ before :save
# >> $$$$ after :save
# >>
# >>
# >>
# >> --- Now to save
# >> %%%%%%% saving Ticket
# >> $$$$ before :save
# >> $$$$ after :save
# >> %%%%%%% saving History
# >> $$$$ before :save
# >> $$$$ after :save
# >>
# >>
# >>
# >> --- Now to fetch the same one and watch it act differently
# >> %%%%%%% saving Ticket
# >> $$$$ before :save
# >> $$$$ after :save
# >>
# >>
# >>
# >> --- Now load the history and save again
# >> %%%%%%% saving Ticket
# >> $$$$ before :save
# >> $$$$ after :save
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