Rails 3.1 动态嵌套表单

Question

我尝试按照 RailsCasts 示例让动态表单工作，但无法正常工作。基本上我有一个包含多个任务的项目，我希望能够在创建或编辑项目时动态添加和删除任务。我该怎么做？

Answer 1

直接使用 Ryan Bate 的 gem。

It lies here with documentation.顺便说一句，文档准确地描述了您的用例。

Answer 2

Apneadiving 是正确的，但它并不能真正帮助新人。

这仅适用于 ruby​​ on rails 3.1，可能适用于 3.2，但我还没有测试过。

如果您将以下内容添加到您的Application_root/app/assets/javascripts/application.js 文件中（我将其添加到最后一行）：

//= require jquery_nested_form

一个新鲜的看起来如下

// This is a manifest file that'll be compiled into including all the files listed below.
// Add new JavaScript/Coffee code in separate files in this directory and they'll automatically
// be included in the compiled file accessible from http://example.com/assets/application.js
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
//= require jquery
//= require jquery_ujs
//= require_tree .
//= require jquery_nested_form   

或者如果你出于某种原因使用原​​型：

// This is a manifest file that'll be compiled into including all the files listed below.
// Add new JavaScript/Coffee code in separate files in this directory and they'll automatically
// be included in the compiled file accessible from http://example.com/assets/application.js
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
//= require jquery
//= require jquery_ujs
//= require_tree .
//= require prototype_nested_form