This project rocks and uses MIT-LICENSE.

Basically to create new Rails Plugins.

In this example, I create acts_as_tryable plugins follow the Rails Guide Plugins.

Understand the ActiveSupport::Concern and deep undertood both include vs extend.

gem install trying_models

Adding acts_as_tryable to your model file. Ex: app/models/article.rb

class Article < ActiveRecord::Base
  acts_as_tryable
end

Everywhere when you look at the @instance

Ex:

@article = Article.new(name: "example", content: "example")

# try call hello method
@article.hello

# result
# -> "Undefined Method"
# -> it replacement for `raise exception default make app crash`

It not very awesome, It basic and very Simple, It show me how to understand extend include attributes how active record work