class Asset::Cover < Asset
    # attributes
    store :settings, accessors: [:width, :height, :alt]
    # attr_accessible :width, :height, :alt
    has_attached_file :attachment, styles: { thumb: '200x200#', small: '800x600>', medium: '1024x768>', large: '1280x1024>' }, default_url: 'quadro/missing/cover/:style.png', use_timestamp: false