與路由混淆

Question

我目前正在rails中嘗試restful_authentication。這是我的routes.rb文件

ActionController::Routing::Routes.draw do |map| 
map.logout '/logout', :controller => 'sessions', :action => 'destroy' 
map.login '/login', :controller => 'sessions', :action => 'new' 
map.register '/register', :controller => 'users', :action => 'create' 
map.signup '/signup', :controller => 'users', :action => 'new' 
map.resources :users 
map.resource :session 
map.resources :products 

這是我SessionsController它處理登錄和註銷

class SessionsController < ApplicationController 

    # render new.erb.html 
    def new 
    end 

    def create 
    logger.error("Inside create") 
    logout_keeping_session! 
    user = User.authenticate(params[:login], params[:password]) 
    if user 
     # Protects against session fixation attacks, causes request forgery 
     # protection if user resubmits an earlier form using back 
     # button. Uncomment if you understand the tradeoffs. 
     # reset_session 
     self.current_user = user 
     new_cookie_flag = (params[:remember_me] == "1") 
     handle_remember_cookie! new_cookie_flag 
     redirect_back_or_default('/') 
     flash[:notice] = "Logged in successfully" 
    else 
     note_failed_signin 
     @login  = params[:login] 
     @remember_me = params[:remember_me] 
     render :action => 'new' 
    end 
    end 

    def destroy 
    logout_killing_session! 
    flash[:notice] = "You have been logged out." 
    redirect_back_or_default('/') 
    end 

protected 
    # Track failed login attempts 
    def note_failed_signin 
    flash[:error] = "Couldn't log you in as '#{params[:login]}'" 
    logger.warn "Failed login for '#{params[:login]}' from #{request.remote_ip} at #{Time.now.utc}" 
    end 
end 

我注意到，沒有索引操作。因此http://localhost:3000/sessions應該拋出一個未知的動作錯誤，它確實如此。然後我進入了登錄頁面，即：sessionscontroller中的新動作。我擡頭對錶單提交的url，我發現它是 並在提交的螢火顯示的URL是

怎麼的URL重定向到正確的行動？

Verb Path   Action 
------------------------------ 
GET /session/new new 
POST /session  create 
GET /session  show 
GET /session/edit edit 
PUT /session  update 
DELETE /session  destroy 

因爲它是一個單一的資源，所有的路徑使用/session，不/sessions，所以GET：即http://localhost:3000/sessions到http://localhost:3000/sessions/new

Answer 1

你map.resource session線如下自動創建REST風格的路線，匹配了行動要求/sessions將失敗。此外，GET請求/session將觸發show操作，而不是index操作（單個資源沒有index操作）。

查看http://guides.rubyonrails.org/routing.html的「奇異資源」部分（它適用於Rails 3，但仍然適用相同的想法）。