Paperclip :style depending on model (has_many polymorphic images)

Question

I have set up my models to use a polymorphic Image model. This is working fine, however I am wondering if it is possible to change the :styles setting for each model. Found some

Answer 1

Looking at the Paperclip source for Attachment it looks like the styles hash can take an object that responds to call so you may be able to do something like:

class Image < ActiveRecord::Base
  belongs_to :imageable, :polymorphic => true
  has_attached_file :file, :styles => lambda {|attachment| attachment.instance.imageable_type.constantize.image_styles }
end

Then in any model that has many images:

class Art < ActiveRecord::Base
  has_many :images, :as => :imageable

  def self.image_styles
    { :thumb => "150x150>", :normal => "492x600>" }
  end
end

Edit: Looks like someone else beat me to it :P.