Module: PdfCover::ClassMethods::CarrierWave

Defined in:
lib/pdf_cover.rb

Instance Method Summary collapse

Instance Method Details

#pdf_cover_attachment(options = {}) ⇒ Object

When called in the context of a CarrierWave::Uploader::Base subclass, this method will add a processor to the currenct attachment or version that generates a JPEG with 95 quality from the first page of the given PDF.

This will not make any validation on the given content type, you must [do it yourself](github.com/carrierwaveuploader/carrierwave#securing-uploads) on your uploader.

Examples:

Adding a version to your uploader:

class WithCarrierwaveUploader < CarrierWave::Uploader::Base
  include PdfCover

  storage :file

  version :image do
    pdf_cover_attachment
  end
end


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# File 'lib/pdf_cover.rb', line 32

def pdf_cover_attachment(options = {})
  process pdf_cover: [options[:quality], options[:resolution]]
  process enforce_content_type: "image/jpeg"

  define_method :full_filename do |for_file = model..file|
    for_file.gsub(/pdf$/i, "jpeg")
  end
end