Fernando Perez wrote:
> Hi,
>
> Let's say I upload a pdf file. Imagemagick extracts all pages out of it
> and stores the png images on the hard-drive. How to easily handle all
> these generated files with Paperclip?
>
> Has anyone done that before? Thanks for your advice
I've done precisely this just recently. It isn't as tricky as it seems,
really. All you need are a few steps in your pdf processor that will
take the extracted images and add them to a new record. So, if you have
the following relationship:
class Document < ActiveRecord::Base
has_many :images
has_attached_file :file, :styles => { :original => {} }, :processors
=> [:extract]
end
class Image < ActiveRecord::Base
belongs_to :document
has_attached_file :image
end
In your processor perform your extraction to a temporary folder, and
after it is done do something like the following:
if @attachment.respond_to?(:instance) and
@attachment.instance.respond_to?(:images)
@attachment.instance.images.destroy_all
Dir.glob("#...@temporary}/*.{jpg,png}").each do |path|
File.open(path) { |file| @attachment.instance.images.create(:image
=> file) }
end
else
raise PaperclipError, "Unable to save extracted pages. No valid
attachment."
end
Afterwards make sure to remove the temporary folder and you should be
good.
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