How to thumbnail a multi-page pdf with paperclip

Question

I\'d like to have Paperclip create 2 thumbnails for each page of a multipage PDF file that is uploaded.

I\'m running Paperclip 2.3.1.1 and using this in my Asset model:<

Answer 1

Here how I implemented similar task.

Document model:

class Document < ActiveRecord::Base

  has_many :pages, :dependent => :destroy

  has_attached_file :asset

  after_asset_post_process :make_pages

  private

  def make_pages
    if valid?
      Paperclip.run('convert', "-quality #{Page::QUALITY} -density #{Page::DENSITY} #{asset.queued_for_write[:original].path} #{asset.queued_for_write[:original].path}%d.png")
      images = Dir.glob("#{asset.queued_for_write[:original].path}*.png").sort_by do |line|
        line.match(/(\d+)\.png$/)[1].to_i
      end

      images.each do |page_image|
        pages.build(:asset => File.open(page_image))
      end
      FileUtils.rm images
    end
  end
end

Page model:

class Page < ActiveRecord::Base

  belongs_to :document

  has_attached_file :asset

  QUALITY = 100
  DENSITY = '80x80'

end