class Image < ActiveRecord::Base def self.max_size Image.attachment_options[:max_size] end sanitize_filename has_attachment :content_type => :image, :storage => :file_system, :path_prefix => 'public/image_uploads', :resize_to => '320x200>', :thumbnails => { :big => '150x150', :thumb => '100x100', :portrait => '64x64', :minor => '50x50', :icon => '20x20!' }, :max_size => 500.kilobytes # remember to update validate message below validates_attachment :size => N_("%{fn} of uploaded file was larger than the maximum size of 500.0 KB") delay_attachment_fu_thumbnails postgresql_attachment_fu end