删除嵌套对象 [英] Deleting nested objects

问题描述

我有一个个人资料，并且此个人资料有很多curso(课程).我会在个人资料的show.html.erb上显示该个人资料中的所有课程.

I have a profile, and this profile has many cursos (courses). I show all the courses a profile has on the show.html.erb of this profile.

<% for curso in @profile.cursos %>
<li><%=h curso.nome %> - <%=h curso.universidade %><br>
Ingresso em: <%=h curso.ano_ingresso %> - Encerra em: <%=h curso.ano_termino %> 
<li>
<%= button_to 'Delete', { :action => "destroy", :id => curso.id },:confirm => "Are you sure?", :method => :delete %>

这样，我可以在个人资料页面上显示其个人资料中的所有课程，但是button_to delete只是不起作用.我已经尝试了很多事情，但我想我已经迷路了.关于如何创建链接或按钮或删除课程的任何想法?

This way, I'm able to show all the courses a profile has on it's page, but the button_to delete just doesn't work. I have tried many things already, but I think I'm lost. Any idea on how I can create a link or a button or anything to delete the courses?

推荐答案

在您的路线文件中

resources :profiles do
    resources :courses
end

然后您可以只使用link_to方法

Then you can just use link_to method

<%= link_to "Delete", profile_course_path(profile, course), :method => :delete %>

确保提供正确的变量profile和course

Make sure you are providing the correct variables profile and course

然后，您需要在courses_controller.rb中获取配置文件.

Then in your courses_controller.rb you need to get the profile.

before_filter :get_profile

def get_profile
    @profile = Profile.find(params[:profile_id]) if params[:profile_id]
end

def destroy
  @course = Corse.find(params[:id])
  @course.destroy
  redirect_to profile_courses_path(@profile)
end 

这将带您回到嵌套课程的正确个人资料网址.

That will take you back to the correct profile url with it's nested courses.

对于新课程，您可以使用以下链接:

For new courses you can use the following link:

<%= link_to "New Course", new_profile_course_path(profile) %>

这将带您进入课程控制器中的new操作.

That will take you to the new action in the courses controller.

您应该在此处上阅读嵌套表格.

You should read up on nested forms here.

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