资源生成器和控制器生成器之间的区别

本文介绍了资源生成器和控制器生成器之间的区别的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

当我这样做时

rails g 模型用户名:字符串rails g 控制器用户索引创建新的销毁显示

并编辑 config/routes.rb 以添加:

资源:用户

bundle exec rake 路由给出:

users POST/users(.:format) {:action=>"create", :controller=>"users"}new_users GET/users/new(.:format) {:action=>"new", :controller=>"users"}edit_users GET/users/edit(.:format) {:action=>"edit", :controller=>"users"}GET/users(.:format) {:action=>"show", :controller=>"users"}PUT/users(.:format) {:action=>"update", :controller=>"users"}删除/users(.:format) {:action=>"destroy", :controller=>"users"}

但是，当我这样做时

rails g 资源用户名:字符串

(自动添加资源 :users 到 config/routes.rb)捆绑执行耙路线

我明白

users GET/users(.:format) {:action=>"index", :controller=>"users"}POST/users(.:format) {:action=>"create", :controller=>"users"}new_user GET/users/new(.:format) {:action=>"new", :controller=>"users"}edit_user GET/users/:id/edit(.:format) {:action=>"edit", :controller=>"users"}user GET/users/:id(.:format) {:action=>"show", :controller=>"users"}PUT/users/:id(.:format) {:action=>"update", :controller=>"users"}删除/users/:id(.:format) {:action=>"destroy", :controller=>"users"}

所以我的问题是，

当我生成一个控制器时，我怎样才能获得正确的辅助方法来制作link_to 'Destroy', 实例, :method=> :delete工作?

因为当前它给出了一个错误 user_path 未定义.

解决方案

你应该打电话

rails g controller user index create new destroy show

代替

rails g controller users index create new destroy show

为了让 resources :users 给你你想要的帮助.

后者使 Rails 假定 users 是一个单一对象，并且 resources :users 应该创建所谓的单一资源:

guides.rubyonrails/routing.html#singular-resources

因此，user_path 未定义，而 users_path 已定义.

when I do

rails g model user name:string rails g controller users index create new destroy show

and edit config/routes.rb to add:

resource :users

bundle exec rake routes gives:

users POST /users(.:format) {:action=>"create", :controller=>"users"} new_users GET /users/new(.:format) {:action=>"new", :controller=>"users"} edit_users GET /users/edit(.:format) {:action=>"edit", :controller=>"users"} GET /users(.:format) {:action=>"show", :controller=>"users"} PUT /users(.:format) {:action=>"update", :controller=>"users"} DELETE /users(.:format) {:action=>"destroy", :controller=>"users"}

however, when I do

rails g resource users name:string

(which automatically adds resources :users to config/routes.rb) bundle exec rake routes

I get

users GET /users(.:format) {:action=>"index", :controller=>"users"} POST /users(.:format) {:action=>"create", :controller=>"users"} new_user GET /users/new(.:format) {:action=>"new", :controller=>"users"} edit_user GET /users/:id/edit(.:format) {:action=>"edit", :controller=>"users"} user GET /users/:id(.:format) {:action=>"show", :controller=>"users"} PUT /users/:id(.:format) {:action=>"update", :controller=>"users"} DELETE /users/:id(.:format) {:action=>"destroy", :controller=>"users"}

So my question is,

when I generate a controller how can I get the correct helper methods to make link_to 'Destroy', instance, :method=> :delete work?

Because currently it gives an error user_path is not defined.

解决方案

You should call

rails g controller user index create new destroy show

instead of

rails g controller users index create new destroy show

in order to get resources :users to give you the helpers you want.

The latter causes Rails to assume that users is a singular object, and that resources :users should create what is called a singular resource:

guides.rubyonrails/routing.html#singular-resources

as a result, user_path is undefined, whereas users_path is defined.