Commands

Use bin/rails instead of rails ensuring to use rails in this develop environment.

• Shortcut: bin/rails g for bin/rails generate
• New model: bin/rails generate model Product name:string
• New migration:
  • bin/rails generate migration MyNewMigration
  • bin/rails generate migration add_fieldname_to_tablename fieldname:string
• Run migration: bin/rails db:migrate
• Roll back database:
  • bin/rails db:rollback VERSION=X
  • bin/rails db:rollback STEP=2
• All routes respond to: bin/rails routes
• Create a controller with specified action(s) or add new action(s) and its test: bin/rails generate controller Products index
• bin/rails generate scaffold Product name:string price:decimal description:text: generate all the things below

app/models/product.rb                     # 模型
app/controllers/products_controller.rb    # 控制器（含 index/show/new/edit/create/update/destroy）
app/views/products/                       # 视图文件（7 个）
  ├── index.html.erb
  ├── show.html.erb
  ├── new.html.erb
  ├── edit.html.erb
  ├── _form.html.erb
config/routes.rb                          # 自动添加 resources :products
db/migrate/xxxxxxxxxxxx_create_products.rb # 数据库迁移文件
test/models/product_test.rb               # 测试文件

• bin/rails g resource Product name price description: model, controller, routes, without views.
  • flags:
    • --skip-routes
    • --no-assets: No helper and style sheet.
• bin/rails generate authentication: Create User and Session MVC.
• bin/rails dev:cache: Enable Caching in development.
• Enable action text:

bin/rails action_text:install
bundle install
bin/rails db:migrate