在Rails中轻松布线 [英] Simple routing in Rails

问题描述

我正在尝试从用户显示视图中破坏链接。

I'm trying to destroy a link from a User Show view.

因此来自 / users / 1 ，

我想在 teacher_student_links 破坏操作

I want to access destroy action in teacher_student_links controller.

第一次尝试：

<%= link_to 'destroy', :controller => "teacher_student_links", :action => "destroy", :id => @user.id %>

此操作失败，因为它会路由到指定控制器中的显示操作。 第一个问题：为什么它指向显示操作而不是破坏？我试图用括号将上面的内容括起来，并且也得到了毫无意义的错误。

This fails because it routes to "show" action in the specified controller. So first question: why does it point to the "show" action instead of "destroy?" I tried to enclose the above with parenthesis, and got a meaningless error as well.

第二次尝试：

在 config / routes.rb

match '/bye_teacher' => 'teacher_student_links#destroy'

视图

<%= link_to 'destroy', '/bye_teacher', :user_id => @user.id %>

也尝试过，

<%= link_to 'destroy', '/bye_teacher', :user_id => @user %>

两行正确地直接指向指定的控制器和操作，但是未传入参数。（可以'找不到没有ID错误的用户）

Both lines correctly direct to the specified controller and action, but the parameter is not passed in. (can't find the user without an ID error)

第二个问题：在这种情况下，我是否以错误的方式传递了变量？

问这两个问题有点尴尬，但我想知道这些问题背后的原因。

It's little embarrassing to ask these two questions, but I wanted to know the reasons behind these problems.

更新：

<%= link_to 'destroy', teacher_student_links_path(:user_id => @user), :method => :delete %>

给予

没有路线匹配[删除] / teacher_student_links

No route matches [DELETE] "/teacher_student_links"

<%= link_to 'destroy', teacher_student_links_path(@user), :method => :delete %>

给予

No route matches [DELETE] "/teacher_student_links.1"

...所以我跑

耙路，我得到了

删除/teacher_student_links/:id(.:format）Teacher_student_links＃destroy

推荐答案

您输入的路径错误

<%= link_to 'destroy', teacher_student_links_path(@user), :method => :delete %>

应该是这样的：

<%= link_to 'destroy', teacher_student_link_path(@user), :method => :delete %>

当您运行耙路时，第一栏会告诉您路径

When you run 'rake routes' then 1st column will tell you the path

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