class PictureUploader < CarrierWave::Uploader::Base # Include MiniMagick support: include CarrierWave::MiniMagick process resize_to_limit: [400, 400] # Choose what kind of storage to use for this uploader: storage :file # 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 "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}" end # Provide a default URL as a default if there hasn't been a file uploaded: # def default_url(*args) # # For Rails 3.1+ asset pipeline compatibility: # # ActionController::Base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_')) # # "/images/fallback/" + [version_name, "default.png"].compact.join('_') # end # Create different versions of your uploaded files: version :tiny do process resize_to_fit: [20, 20] end version :small do process resize_to_fit: [50, 50] end version :medium do process resize_to_fit: [100, 100] end # Add a white list of extensions which are allowed to be uploaded. # For images you might use something like this: def extension_whitelist %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