devise

https://github.com/plataformatec/devise

Ruby

Flexible authentication solution for Rails with Warden.

Devise::Models.config

Creates configuration values for Devise and for the given module.

  Devise::Models.config(Devise::DatabaseAuthenticatable, :stretches)

The line above creates:

  1) An accessor called Devise.stretches, which value is used by default;

  2) Some class methods for your model Model.stretches and Model.stretches=
     which have higher priority than Devise.stretches;

  3) And an instance method stretches.

To add the class methods you need to have a module ClassMethods defined
inside the given class.

Source | Google | Stack overflow

Edit

git clone [email protected]:plataformatec/devise.git

cd devise

open lib/devise/models.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Devise--Models-config-for-pr

# Commit to git

git add lib/devise/models.rbgit commit -m "better docs for Devise::Models.config"

# Open pull request

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

hub fork

git push <your name> -your-name--update-docs-Devise--Models-config-for-pr

hub pull-request

# Celebrate!