Tan Nguyen questions

Tan Nguyen answers

• What is the difference between a token and a digest?
• How to rake db:migrate on a Heroku staging pipeline?
• Rails ActiveRecord sort by count of join table associations
• Rails 5 devise_token_auth Can't verify CSRF token authenticity
• friendly_id slug not changing on update
• How to fix "Your Ruby version is 2.3.0, but your Gemfile specified 2.2.5" while server starting