Calculating an Images Orientation using Paperclip

If you ever need to know if an image is portrait or landscape in orientation, you can do the following (assuming you have an orientation attribute on your model:

class Image < ActiveRecord::Base
  # Paperclip
  has_attached_file :file
  
  # Callbacks
  before_create :set_orientation
  
  protected
  
  def set_orientation
    original_file = self.file.to_file(:original)
    dimensions = Paperclip::Geometry.from_file(original_file)
    self.orientation = (dimensions.width > dimensions.height) ? 'landscape' : 'portrait'
  end
end