Inspire Creativity: Rails: Hack belongs_to to allow :select

Rails: Hack belongs_to to allow :select

kevin — Tue, 17 Apr 2007 17:57:35 -0500

For some reason most rails associations allow :select as a parameter to limit which rows are loaded, but belongs_to doesn't.

Here's my (only rudimentarily tested) monkey-patch to add it:

module ActiveRecord::Associations::ClassMethods
  def create_belongs_to_reflection(association_id, options)
    $stderr.puts "MAKING REFLECTION"
    options.assert_valid_keys(
      :select, #added
      :class_name, :foreign_key, :foreign_type, :remote, :conditions, :order, :include, :dependent, 
      :counter_cache, :extend, :polymorphic
    )
    
    reflection = create_reflection(:belongs_to, association_id, options, self)

    if options[:polymorphic]
      reflection.options[:foreign_type] ||= reflection.class_name.underscore + "_type"
    end

    reflection
  end
end
module ActiveRecord
  module Associations
    class BelongsToAssociation  @reflection.options[:select] || '*', #added
          :conditions => conditions,
          :include    => @reflection.options[:include]
        )
      end
    end
  end
end

Technorati Tags: monkey patching, ruby on rails

"Rails: Hack belongs_to to allow :select" by Martin

Wed, 14 May 2008 06:04:53 -0500

hey kevin i heard you created The Ap site i was wondering if you could help me with the scritp for the chatterbox you have there my email is morbid.maney@gmail.com

"Rails: Hack belongs_to to allow :select" by andrew

Mon, 17 Mar 2008 06:53:16 -0500

Looks nice and works thanks!

"Rails: Hack belongs_to to allow :select" by Very Kewel Site

Tue, 28 Aug 2007 20:54:24 -0500

I can see why a lot of people would really enjoy your links here.

"Rails: Hack belongs_to to allow :select" by Edwin

Fri, 13 Jul 2007 03:24:12 -0500

Really good work, I've just tried and I like it very much. Thanks!

"Rails: Hack belongs_to to allow :select" by Arnod

Wed, 04 Jul 2007 04:40:41 -0500

Kevin, may I ask do you work on something else for the moment? Coz I can't find anything new at this hub...

"Rails: Hack belongs_to to allow :select" by Led

Wed, 23 May 2007 08:14:20 -0500

Looks nice and works ;) thanks!

"Rails: Hack belongs_to to allow :select" by Kevin Watt

Wed, 23 May 2007 02:29:05 -0500

I am also Kevin Watt. That's all

"Rails: Hack belongs_to to allow :select" by Jimy T.

Tue, 08 May 2007 07:00:12 -0500

Wow thanks! I’m a regular reader and enjoy your work. Keep it up!

"Rails: Hack belongs_to to allow :select" by Bill

Fri, 04 May 2007 15:56:14 -0500

Very cool feature. Great that this service works on any site not just blogs.