carrierwave

https://github.com/carrierwaveuploader/carrierwave

Ruby

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

FormalGroup#default_cover_photo

default_cover_photo is the name of the proc used to determine the url for the default cover photo
default_group_cover is the associated DefaultGroupCover object from which we get our default cover photo

Source | Google | Stack overflow

Edit

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

cd carrierwave

open

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-FormalGroup-default_cover_photo-for-pr

# Commit to git

git add git commit -m "better docs for FormalGroup#default_cover_photo"

# Open pull request

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

hub fork

git push <your name> -your-name--update-docs-FormalGroup-default_cover_photo-for-pr

hub pull-request

# Celebrate!