与：id的rails路由不起作用 [英] rails routes with :id not working

问题描述

我有一个名为Schedule的模型，该模型属于一个项目。一个项目有一个时间表。我正在尝试遵循CRUD约定，但是有些困难。我有一个页面，其中列出了所有项目，并且每个项目旁边都有一个链接来创建时间表。我在路由文件中从以下内容开始：

I have a model called Schedule that belongs_to a project. A project has_one schedule. I am trying to follow CRUD conventions but having some difficult. I have a page that lists all the projects and has a link next to each project to create a schedule. I started out with the following in my route file:

resources :schedules

这是问题所在。在新时间表页面的网址中，需要有一个：id来引用该时间表所属的项目，这样，在创建时间表时它将属于适当的项目。我不知道使用资源的方法，因此我将路线代码更改为：

Here's the problem. In the url of the 'new schedule' page there needs to be an :id that refers to the project that the schedule belongs to, that way when the schedule is created it will belong to the proper project. I don't know of a way to do that with resources, so I changed my routes code to:

match 'schedules/new/:id', to: 'schedules#new', as: :new_schedule, via: [:get, :post]
resources :schedules, except: [:new, :create]

由于某些原因，此页面为空白。只是白色如何修复路线？谢谢。

For some reason, this page is blank. It's just white. How do I fix my routes? Thanks.

更新：

我还尝试将路线更改为以下内容：

I also tried changing my routes to the following:

resources :projects do
    resources :schedules
end

这使新日程表的URL形式为：

This makes the url for a new schedule in the form of:

/projects/:project_id/schedules/new(.:format)

我认为这应该是这样可以完成，但是新时间表的格式为

I think this is how it should be done, however, the form for new schedules is written as

form_for @schedule

，并产生以下错误：

undefined method `schedules_path'

有什么想法吗？

推荐答案

由于您具有嵌套的资源/路由，因此需要传递一个包含 @schedule 实例变量的数组（新的 Schedule 对象）以及@project实例变量（保存父 Project 对象）到 form_for ：

Since you have a nested resource/route, you need to pass an array containing both the @schedule instance variable (holding the new Schedule object) along with the @project instance variable (holding the parent Project object) to your form_for:

form_for [@project, @schedule]

EXPLANATION ：

您的命名匹配路线（即 match'schedules / new /：id'）路由失败，因为 schedules＃new 控制器操作是RESTful的，因此不会不是接受 id 参数。但是，您在更新中正确地修改了路线–通过嵌套资源，确实可以在路线中表示项目/进度表之间的父子关联。

Your named match route (i.e., match 'schedules/new/:id') fails to route because the schedules#new controller action is RESTful and thus does not accept an id parameter. However, you correctly amended your route in your update – the parent-child association between projects/schedules should indeed be represented in your routes by nesting your resources.

结果路径– / projects /：project_id / schedules / new –要求将一组对象传递给您的 form_for 助手。第一个必须是现有的 Project 对象（从而满足：project_id 参数），第二个必须是新的 Schedule 对象（根据定义，该对象尚未分配 id 属性）。

The resulting path – /projects/:project_id/schedules/new – requires that an array of objects be passed to your form_for helper. The first must be an existing Project object (thus satisfying the :project_id parameter) and the second must be a new Schedule object (which, by definition, will not yet have an id attribute assigned).

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