Ejemplo de Uploader para RedactorRails

image_uploader.rb

# encoding: utf-8

class ImageUploader < CarrierWave::Uploader::Base

  # Include RMagick or MiniMagick support:
  include CarrierWave::RMagick
  # include CarrierWave::MiniMagick

  # Include the Sprockets helpers for Rails 3.1+ asset pipeline compatibility:
  include Sprockets::Helpers::RailsHelper
  include Sprockets::Helpers::IsolatedHelper

  # Choose what kind of storage to use for this uploader:
  storage :file
  # storage :fog

  # 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
    "system/redactor_assets/pictures/#{model.class.to_s.underscore}/#{model.id}"
  end

  # Provide a default URL as a default if there hasn't been a file uploaded:
  def default_url
    # For Rails 3.1+ asset pipeline compatibility:
    # asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
    asset_path("fallback/" + [version_name, "default.gif"].compact.join('_'))
    # "assets/fallback/" + [version_name, "default.gif"].compact.join('_')
  end


  # Process files as they are uploaded:
  # process :scale => [200, 300]
  #
  # def scale(width, height)
  #   # do something
  # end

  # Create different versions of your uploaded files:
  version :thumb do
    process :resize_to_fill => [64, 64]
  end

  version :medium do
    process :resize_to_fill => [120, 120]
  end


  version :large do
    process :resize_to_limit => [800, 600]
  end

   version :curriculum do
    process :resize_to_fill  => [190, 190]
  end

  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  # def extension_white_list
  #   %w(jpg jpeg gif png)
  # end

  # Override the filename of the uploaded files:
  # Avoid using model.id or version_name here, see uploader/store.rb for details.
  # def filename
  #   "something.jpg" if original_filename
  # end

end