rails-generate

TLDR

List all available generators

$ rails generate

Generate a new model named Post with attributes title and body

$ rails generate model [Post] [title:string] [body:text]

Generate a new controller named Posts with actions index, show, new and create

$ rails generate controller [Posts] [index] [show] [new] [create]

Generate a new migration that adds a category attribute to an existing model called Post

$ rails generate migration [AddCategoryToPost] [category:string]

Generate a scaffold for a model named Post, predefining the attributes title and body

$ rails generate scaffold [Post] [title:string] [body:text]