Rails terminology: component, plugin, generator, Engine

• Component

  The display end is a collection of controllers and views, focusing on the display interface. For example, the component that specifically displays the song list can be called to display the song list on all pages.

• Plugin

  Modules that enhance system functions focus on technical functions, such as enhancing form-tag-helper and enhancing activerecord

• Generator

  Automatic Generation of rails through scriptCodeSome third-party extensions also use genrator to generate code

• Engine

  It is the successor of generator and focuses on an application layer function. It can be understood that it is orthogonal to the plug-in function. For example, a login module only solves the problem of logging on to this service layer, after downloading the engine, you can make custom modifications to fit your business.