Method: FileColumn::BaseUploadedFile#create_magick_version_if_needed

Defined in:
lib/magick_file_column.rb

#create_magick_version_if_needed(version) ⇒ Object 



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

def create_magick_version_if_needed(version)
  # RMagick might not have been loaded so far.
  # We do not want to require it on every call of this method
  # as this might be fairly expensive, so we just try if ::Magick
  # exists and require it if not.
  begin 
    ::Magick 
  rescue NameError
    require 'RMagick'
  end

  if version.is_a?(Symbol)
    version_options = options[:magick][:versions][version]
  else
    version_options = MagickExtension::process_options(version)
  end

  unless File.exists?(absolute_path(version_options[:name]))
    begin
      img = ::Magick::Image::read(absolute_path).first
    rescue ::Magick::ImageMagickError
      # we might be called directly from the view here
      # so we just return nil if we cannot load the image
      return nil
    end
    dirname = version_options[:name]
    FileUtils.mkdir File.join(@dir, dirname)
    transform_image(img, version_options, absolute_path(dirname))
  end

  version_options[:name]
end