Rails - Oct 2007 - rake db:migrate tells me a custom validation is not avail.!

Hi all

I have the following custom validation helper in application.rb:

module ActiveRecord::Validations::ClassMethods
  def validates_email_format_of(*attr_names)
    configuration = {}
    configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)

    validates_each(attr_names.first.to_s) do |record, attr_name, value|
      unless configuration[:if] and not
evaluate_condition(configuration[:if], record) # Evaluate :if option
        next if configuration[:allow_nil] and
record.send("#{attr_name}_before_type_cast").nil? # Skip this one if
emptyness is allowed and the email attribute is empty

        if record.send(attr_name.to_sym) !~
/^([a-z0-9\.\-äöüèàéê_])+@([a-z0-9\.\-äöüèàéê_])+\.([a-z]{2,})$/i #
Check if the email is valid
          record.errors.add(attr_name,
ActiveRecord::Errors::default_error_messages[:invalid_email_format])
        end
      end
    end
  end
end

In my model Member I call validates_email_format_of :email.

class Member < ActiveRecord::Base
  ...
  validates_email_format_of :email
  ...
end

When starting script/console there''s no problem - When no email or a
wrong email is supplied, I get the appropriate error message added to
the model instance.

However, when adding the following migration...

class AddCreatorAndOwner < ActiveRecord::Migration
  def self.up
    # Check if there is a member with the ID 1 which is supposed to be
the webmaster
    raise "There is no member with the ID 1 (Webmaster)!" unless
Member.find(1)

    # Add the new column :creator_id which holds as default the ID 1
(webmaster)
    add_column :music_artists, :creator_id, :integer, :null => false,
:default => 1, :references => :members, :on_delete => :restrict

    # Alter the field so for future management of music artists one has
to specify a creator_id (1 is not default anymore!)
    execute("ALTER TABLE music_artists MODIFY creator_id INTEGER(11) NOT
NULL")
  end

  def self.down
    drop_column :music_artists, :creator_id
  end
end

...I always get the following error:

192:~/Sites/projects/export josh$ rake db:migrate
/usr/local/bin/rake:17:Warning: require_gem is obsolete.  Use gem
instead.
(in /Users/josh/Sites/projects/export)
== AddCreatorAndOwner: migrating
=============================================rake aborted!
undefined method `validates_email_format_of'' for Member:Class

(See full trace by running task with --trace)

What''s wrong here? Why won''t the Member class find the
validates_email_format_of method in the migration, but when using it in
the console it does?

Thanks a lot for help.
Josh
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Hrm maybe application.rb is the wrong place for custom validation 
helpers? Where should I put them? Or is it because of something else...?
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Joshua Muheim wrote:
> Hrm maybe application.rb is the wrong place for custom validation 
> helpers? Where should I put them? Or is it because of something else...?
Well, I moved it now to 
vendor/plugins/some_plugin/lib/custom_validations.rb

and load it in vendor/plugins/some_plugin/init.rb, and now it works. No 
idea why it didn''t before, however, this way it is cleaner, anyway. ;-)
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