ActiveRecord：：RecordNotFound "Couldn't find user with id=new"

Question

每当我单击表单中的更新按钮时，它都会重定向到/users/new.1，从而引发错误Couldn't find User with id=new。救命！

user_controller.rb

  def edit
    @user = User.find(params[:id])
  end
  def update
    @user = User.find(params[:id])
    if @user.update_attributes(user_params)
      redirect_to @user
    else
      render "edit"
    end
  end
  private
  def user_params
    params.require(:user).permit(:id, :name, :password, :password_confirmation, :email, :password_salt, :password_hash, :phone)
  end 

edit.html.erb

<%= form_for @user, url: user_path(@user), method: :patch do |f| %>
    <p>
        <%= f.label :name %><br />
        <%= f.text_field :name %><br />
        <%= f.label :mobile %><br />
        <%= f.text_field :phone %><br />
        <%= f.label :email %><br />
        <%= f.text_field :email  %><br />
        <%= f.label :role %><br />
        <%= f.text_field :role  %><br />
    <p class="button"><%= f.submit "Update"%></p>
<% end %>

路线.rb

  get "logout" => "pages#destroy", :as => "logout"
  get 'welcome/index'
  get 'users/new', :as => 'user'
  root :to => 'welcome#index'
  resources :users

Answer 1

从routes.rb文件中删除无关的get 'users/new', :as => 'user'行。resources :users为您处理所有CRUD路由。

Answer 2

对于redirect_to，您必须为其提供路径（或控制器和操作）。

你会想要使用这个：

redirect_to user_path(@user)

以下是关于该主题的rails参考：http://api.rubyonrails.org/classes/ActionController/Redirecting.html