wblog/app/uploaders/photo_uploader.rb

# encoding: utf-8

class PhotoUploader < CarrierWave::Uploader::Base
  include CarrierWave::MiniMagick

  storage :file

  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  process :resize_to_limit => [1200,nil]

  version :medium do
    process :resize_to_limit => [640,nil]
  end

  version :small do
    process :resize_to_limit => [400,nil]
  end

  def extension_white_list
    %w(jpg jpeg gif png)
  end

end