class Asset::Image < Asset
    # attributes
    store :settings, accessors: [:width, :height, :alt]
    # attr_accessible :width, :height, :alt
    has_attached_file :attachment, styles: { thumb: '200x200#', small: '320x240>', medium: '640x480>', large: '800x600>' }, default_url: 'quadro/missing/image/:style.png', use_timestamp: false