after_find callback broken after upgrade to rails3

rubyonrails-talk
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.