Newbe: observer setup


#1

Hi All,

Having problem setting up an observer to log changes to
a database. I have following the Prag Rails book but think
I have something missing. I am trying a simple puts to see
if the observer is working, but getting nothing on the console.

Here is what I have. I don’t get any errors.
Thanks for any suggestions/references to debugging.

Dave

The two models:

display_ad.rd

require ‘observer’
class DisplayAd < ActiveRecord::Base
include Observable
has_many :activities
#def after_update
# puts “Updated display ad
#end
end

display_ad_observer.rd

class DisplayAdObserver < ActiveRecord::Observer
observe DisplayAd

def after_save(display_ad)
an_display_ad.logger.info( “Added display ad: #{an_display_ad.id}”)
puts “Saved display ad
end

def after_update(display_ad)
puts “Updated display ad
an_display_ad.logger.info( “Updated display ad: #
{an_display_ad.id}”)
end
end
DisplayAdObserver.instance

And in environment.rb

config.active_record.observers = :display_ad_observer