gistfile1.rb

# encoding: utf-8
class AssetUploader < CarrierWave::Uploader::Base
  cattr_accessor :current_account
  # Include RMagick or ImageScience support:
   include CarrierWave::RMagick
  # include CarrierWave::ImageScience
  

  # Choose what kind of storage to use for this uploader:
  #storage :file
  storage :s3
  
  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    # files will be stored scoped to the currently logged in domain
    "#{self.current_account.domain}/#{model.id}"
  end
  
 version :thumb do
   process :resize_to_limit => [100, 100] if :image?
 end

 def image?
    # access the to be uploaded file and detect if its an image or not
    # something like !asset.content_type.match(/image|png|jpg|jpeg|gif/).nil?
 end
 
 # def extension_white_list
 #    %w(jpg jpeg gif png)
 #  end

end