ruby-on-rails - 如何重定向回我当前所在的页面？

Question

在我的用户相册页面中，他们会看到他们上传的照片，并且每张照片上都有一个“设为默认”链接。当用户点击 make default 时，照片的 ID 将存储在我的配置文件表的 photo_id 列中。

问题是将他们重定向回:

localhost:3000/settings/photo_gallery/:id

有没有一种方法可以使用刚刚设置为默认照片的 ID 重定向回相册？ Rails 是否可以通过查看照片的 ID 找到我要重定向到哪个相册，因为照片属于相册，而相册有很多照片？

我的数据库中有以下表格:

• 用户:有一个个人资料，有很多相册
• 个人资料:属于用户
• PhotoAlbum(s):属于用户，有很多张照片
• 照片:属于相册

Controller Action :

def set_default_profile_photo

  photo = Profile.find_by_user_id(current_user.id)
  photo.photo_id = params[:photo_id]
  photo.save

  redirect_to "**HERE IS WHERE I'D LIKE TO REDIRECT TO THE PHOTOALBUM THE PHOTO IS IN**"
  flash[:success] = "Default photo set!"

end

我的路线:

                    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"}
                 sessions GET    /sessions(.:format)                               {:action=>"index", :controller=>"sessions"}
                          POST   /sessions(.:format)                               {:action=>"create", :controller=>"sessions"}
              new_session GET    /sessions/new(.:format)                           {:action=>"new", :controller=>"sessions"}
             edit_session GET    /sessions/:id/edit(.:format)                      {:action=>"edit", :controller=>"sessions"}
                  session GET    /sessions/:id(.:format)                           {:action=>"show", :controller=>"sessions"}
                          PUT    /sessions/:id(.:format)                           {:action=>"update", :controller=>"sessions"}
                          DELETE /sessions/:id(.:format)                           {:action=>"destroy", :controller=>"sessions"}
                passwords GET    /passwords(.:format)                              {:action=>"index", :controller=>"passwords"}
                          POST   /passwords(.:format)                              {:action=>"create", :controller=>"passwords"}
             new_password GET    /passwords/new(.:format)                          {:action=>"new", :controller=>"passwords"}
            edit_password GET    /passwords/:id/edit(.:format)                     {:action=>"edit", :controller=>"passwords"}
                 password GET    /passwords/:id(.:format)                          {:action=>"show", :controller=>"passwords"}
                          PUT    /passwords/:id(.:format)                          {:action=>"update", :controller=>"passwords"}
                          DELETE /passwords/:id(.:format)                          {:action=>"destroy", :controller=>"passwords"}
                 profiles GET    /profiles(.:format)                               {:action=>"index", :controller=>"profiles"}
                          POST   /profiles(.:format)                               {:action=>"create", :controller=>"profiles"}
              new_profile GET    /profiles/new(.:format)                           {:action=>"new", :controller=>"profiles"}
             edit_profile GET    /profiles/:id/edit(.:format)                      {:action=>"edit", :controller=>"profiles"}
                  profile GET    /profiles/:id(.:format)                           {:action=>"show", :controller=>"profiles"}
                          PUT    /profiles/:id(.:format)                           {:action=>"update", :controller=>"profiles"}
                          DELETE /profiles/:id(.:format)                           {:action=>"destroy", :controller=>"profiles"}
                   emails GET    /emails(.:format)                                 {:action=>"index", :controller=>"emails"}
                          POST   /emails(.:format)                                 {:action=>"create", :controller=>"emails"}
                new_email GET    /emails/new(.:format)                             {:action=>"new", :controller=>"emails"}
               edit_email GET    /emails/:id/edit(.:format)                        {:action=>"edit", :controller=>"emails"}
                    email GET    /emails/:id(.:format)                             {:action=>"show", :controller=>"emails"}
                          PUT    /emails/:id(.:format)                             {:action=>"update", :controller=>"emails"}
                          DELETE /emails/:id(.:format)                             {:action=>"destroy", :controller=>"emails"}
                     root        /                                                 {:controller=>"users", :action=>"new"}
                  success        /success(.:format)                                {:action=>"success", :controller=>"users"}
                    login        /login(.:format)                                  {:action=>"new", :controller=>"sessions"}
                   logout        /logout(.:format)                                 {:action=>"destroy", :controller=>"sessions"}
           reset_password        /reset_password(.:format)                         {:action=>"new", :controller=>"passwords"}
       setup_new_password        /setup_new_password(.:format)                     {:action=>"edit", :controller=>"passwords"}
                 settings        /settings(.:format)                               {:action=>"settings", :controller=>"users"}
         settings_account        /settings/account(.:format)                       {:controller=>"users", :action=>"account"}
    settings_edit_profile        /settings/edit_profile(.:format)                  {:controller=>"profiles", :action=>"edit_profile"}
                                 /:username(.:format)                              {:controller=>"users", :action=>"show"}
          change_password        /change_password(.:format)                        {:action=>"change_password", :controller=>"users"}
profile_photo_set_default        /profile_photo/set_default(.:format)              {:controller=>"photo_albums", :action=>"set_default_profile_photo"}
  album_photo_set_default        /album_photo/set_default(.:format)                {:controller=>"photo_albums", :action=>"set_default_album_photo"}
             photo_albums GET    /settings/photo_gallery(.:format)                 {:action=>"index", :controller=>"photo_albums"}
                          POST   /settings/photo_gallery(.:format)                 {:action=>"create", :controller=>"photo_albums"}
          new_photo_album GET    /settings/photo_gallery/new(.:format)             {:action=>"new", :controller=>"photo_albums"}
         edit_photo_album GET    /settings/photo_gallery/:id/edit(.:format)        {:action=>"edit", :controller=>"photo_albums"}
              photo_album GET    /settings/photo_gallery/:id(.:format)             {:action=>"show", :controller=>"photo_albums"}
                          PUT    /settings/photo_gallery/:id(.:format)             {:action=>"update", :controller=>"photo_albums"}
                          DELETE /settings/photo_gallery/:id(.:format)             {:action=>"destroy", :controller=>"photo_albums"}
                   photos GET    /settings/photo_gallery/photos(.:format)          {:action=>"index", :controller=>"photos"}
                          POST   /settings/photo_gallery/photos(.:format)          {:action=>"create", :controller=>"photos"}
                new_photo GET    /settings/photo_gallery/photos/new(.:format)      {:action=>"new", :controller=>"photos"}
               edit_photo GET    /settings/photo_gallery/photos/:id/edit(.:format) {:action=>"edit", :controller=>"photos"}
                    photo GET    /settings/photo_gallery/photos/:id(.:format)      {:action=>"show", :controller=>"photos"}
                          PUT    /settings/photo_gallery/photos/:id(.:format)      {:action=>"update", :controller=>"photos"}
                          DELETE /settings/photo_gallery/photos/:id(.:format)      {:action=>"destroy", :controller=>"photos"}

Answer 1

这就是你想要的:

redirect_to request.referrer

进一步引用: http://en.wikipedia.org/wiki/HTTP_referer