关于即将到来的 Rails 5，这是目前最完整的新特性列表：What’s new in RAILS 5 ?

列举一些比较值得注意的变化：

• Rails 5 will only work on Ruby 2.2.1 and above
• Rails API merged into Rails
• Render templates outside of controller. Render from anywhere – jobs, rake tasks
• Turbolinks 3
• Action Cable
• Just use rails as the command router: having both rails and rake commands is confusing (Not yet merged)
• belongs_to will now trigger a validation error by default if the association is not present