Ruby on Rails

Dear list,
I am trying to override an after_save callback declared in main app
using plugin.
The main model class is:

class WorkHours < ActiveRecord::Base
@after_save_call_back_called=0
after_save :after_save_call_back
def after_save_call_back
logger.debug "after save called"
@after_save_call_back_called=1
end
end

And in my plugin (in the lib directory) :

module WorkHoursPatch
# cattr_accessor
def self.included(base) # :nodoc:
base.logger.debug "inlcuded called"
base.extend(ClassMethods)
base.send(:include, InstanceMethods)
base.after_save.delete_if{
|callback| callback.method == :after_save_call_back
}
base.send(:after_save, :after_save_call_back_patched)
end

module ClassMethods

end

module InstanceMethods
def after_save_call_back_patched
logger.debug "overriden after save called"
@after_save_call_back_called=1
end
# Wraps the association to get the Deliverable subject. Needed for
the
# Query and filtering
# def is_new
# unless self.is_new.nil?
# return self.is_new
# end
# return false;
# end
end
end
#
## Add module to Issue
WorkHours.send(:include, WorkHoursPatch)

The init.rb says
require 'work_hours_patch'

All this should work and running the console I an see the old plugin
being deleted and the new one added.

Please help!
I am spending on this days!
Evgeny

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