Question

我希望与我的用户链接到另一个页面，但我有一个错误：

RuntimeError in WelcomeController#edit
Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id

在我当前的页面

<%= link_to "edit", welcome_edit_path(@user) %>

这是我的控制者

 def edit
   user = User.find_by_id(@user.id)
 end

在我的页面中，我希望链接到

<%= user.id %>

我知道我的问题是我的@user是nil，但我不知道如何用@user链接到另一个页面所以，请！帮助我

这是我的路线文件

  get "micropost/new"

  get "user/new"
  get "user/saved"

  get "post/new"
  get "post/show"

  get "welcome/index"
  get "welcome/sucess"
  get "welcome/edit"
  root :to => "welcome#index"
  get '/users/:id', :to => 'welcome#sucess', :as => "user"  

  match '/relations', to: 'relation#create', via: 'post'
  match '/relations/:id', to: 'relation#destroy', via: 'delete'
  resources :users
  resources :relations,  only: [:create, :destroy]
  resources :microposts

  match '/login', to: 'welcome#create', via: 'post'
  match '/logout' => 'welcome#destroy', as: :logout
  match '/create', to: 'micropost#create', via: 'post'
  match '/signup', to: 'user#signup', via: 'post'

Answer 1

edit方法中的代码毫无意义。首先，您必须正确定义路线：

get '/welcome/edit/:id', to: 'welcome#edit', as: 'welcome_edit'

然后，在WelcomeController：

def edit
  @user = User.find(params[:id])
end

以及此页面的链接：

<%= link_to 'edit', welcome_edit_path(@user) %>

无法与用户链接到其他页面

1 个答案: