Ruby on Rails - Paperclip and dynamic parameters

Question

I\'m writing some image upload code for Ruby on Rails with Paperclip, and I\'ve got a working solution but it\'s very hacky so I\'d really appreciate advice on how to better imp

Answer 1

While I really like Cade's solution, just a suggestion. It seems like the 'styles' belong to a project...so why aren't you calculating the generators there?

For example:

class Asset < ActiveRecord::Base
  attr_accessible :filename,
  :image # etc.
   attr_accessor :generators

   has_attached_file :image,
     :styles => lambda { |a| a.instance.project.styles }
end


 class Project < ActiveRecord::Base
   ....

   def styles
     @generators ||= self.generators.inject {} do |hash, g|
       hash[g.sym] = "#{g.width}x#{g.height}"
     end
   end
end

EDIT: Try changing your controller to (assuming the project has many assets):

def create
  @project = Project.find(params[:project_id])
  @asset = @project.assets.new
  @asset.generators = @project.generators
  @asset.update_attributes(params[:asset])
  @asset.uploaded_by = current_user
end