carrierwave

https://github.com/carrierwaveuploader/carrierwave

Ruby

Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

CarrierWave::Uploader::FileSize#size_range

Override this method in your uploader to provide a Range of Size which
are allowed to be uploaded.
=== Returns

[NilClass, Range] a size range which are permitted to be uploaded

=== Examples

    def size_range
      3256...5748
    end

Source | Google | Stack overflow

Edit

git clone [email protected]:carrierwaveuploader/carrierwave.git

cd carrierwave

open lib/carrierwave/uploader/file_size.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-CarrierWave--Uploader--FileSize-size_range-for-pr

# Commit to git

git add lib/carrierwave/uploader/file_size.rbgit commit -m "better docs for CarrierWave::Uploader::FileSize#size_range"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-CarrierWave--Uploader--FileSize-size_range-for-pr

hub pull-request

# Celebrate!