Question

我有一张桌子，每一行都有一个链接

 <%= link_to 'Delete', [lesson.group, lesson], remote: true,method: :delete%>

我希望链接销毁相应的db条目并从表中删除相应的行而不重新加载页面。行动是

def destroy
        @lesson = @group.lessons.find(params[:id])

        @lesson.destroy

        respond_to do |format|
            if @lesson
                format.html { redirect_to edit_group_path(@group), notice:'Succesfully deleted lesson' }
                format.js {}
            else
                format.html { redirect_to edit_group_path(@group), notice:'Error!' }
            end
        end
    end

条目被删除，但我只能在重新加载页面时看到更改，并且控制台抛出

DELETE http://localhost:3000/groups/1/lessons/14 500 (Internal Server Error)

从日志中提取：

Started DELETE "/groups/1/lessons/18" for 127.0.0.1 at 2013-10-24 18:39:22 +0400
Processing by LessonsController#destroy as JS
  Parameters: {"group_id"=>"1", "id"=>"18"}
  [1m[36mGroup Load (1.0ms)[0m  [1mSELECT "groups".* FROM "groups" WHERE "groups"."id" = ? LIMIT 1[0m  [["id", "1"]]
  [1m[35mLesson Load (1.0ms)[0m  SELECT "lessons".* FROM "lessons" WHERE "lessons"."group_id" = 1 AND "lessons"."id" = ? LIMIT 1  [["id", "18"]]
  [1m[36m (0.0ms)[0m  [1mbegin transaction[0m
  [1m[35mSQL (4.0ms)[0m  DELETE FROM "lessons" WHERE "lessons"."id" = ?  [["id", 18]]
  [1m[36m (10.0ms)[0m  [1mcommit transaction[0m
Completed 500 Internal Server Error in 35ms

ActionView::MissingTemplate (Missing template lessons/destroy, application/destroy with {:locale=>[:en], :formats=>[:js, :html], :handlers=>[:erb, :builder, :coffee]}. Searched in:
  * "C:/Sites/timetable/app/views"
)

Answer 1

因为您没有处理销毁该对象后应该发生的事情。

respond_to do |format|
        if @lesson
            format.html { redirect_to edit_group_path(@group), notice:'Succesfully deleted lesson' }
            format.js {}
          # ...

format.js {}在这里说＆＃34;用destroy.js.erb或destroy.html.erb或类似的＆＃34;来代替JS，根据你的设置，你没有设置错误（ActionView::MissingTemplate (Missing template application/destroy with {:locale=>[:en], :formats=>[:js, :html], :handlers=>[:erb, :builder, :coffee]}）。

您需要设置该模板，或呈现定义模板的其他操作（例如render action:）。或者你可以做一个重定向（我不确定一个简单的redirect_to在这里工作）。但是请求需要＆＃34;结束＆＃34;不知何故，通过渲染或重定向。

为什么我的rails AJAX请求引发内部服务器错误？

1 个答案: