After_find callback broken after upgrade to rails3

Rails
1

Grettings!

In an app that was working flawlessly in Rails 2.3.8 i have the
following class method:

def self.encode(*attr_names)
  encoder = Encoder.new(attr_names)
  before_save encoder
  after_save encoder
  after_find encoder
  define_method(:after_find) { } # defining here, since there's

only alias in the Encoder class itself
end

This method references the Encoder class. Here is it:

class Encoder
  include Encodings

  def initialize(attrs_to_manage) # We're passed a list of

attributes that should be stored encoded in the database
@attrs_to_manage = attrs_to_manage
end

  def before_save(model) # Before saving or updating, encode the

attributes to their original encoding
@attrs_to_manage.each do |field|
model[field] = to_orig_encod(model[field])
end
end

  def after_save(model)  # After saving, encode them back to utf8
    @attrs_to_manage.each do |field|
      model[field] = to_utf8(model[field])
    end
  end

  alias_method :after_find, :after_save # Do the same after

finding an existing record
end

Before the upgrade to rails3 all the callbacks (before_save,
after_save, after_find) worked fine. After the upgrade before_save
and after_save still work, but after_find does not and I get the
following deprecation warning in my log:

DEPRECATION WARNING: Base#after_find has been deprecated, please

use Base.after_find :method instead

I’m uncertain how to change my code in order to re-enable the
functionality of the after_find callback. I tried a few simple
alternations with no success and the rails API documentation on this
callback is very limited and without examples of implementation.

Any help appreciated, thanks in advance!

2

The idea here is in Rails 3, within ActiveRecord::Base, you should not
define the method after_find such as:

def after_find
do_some_thing
end

Instead, you should do:

after_find :my_after_find_method

def my_after_find_method
do_some_thing
end

Somehow they failed to mention such a simple thing in the API Document.