如何使用新动作的参数声明Rails资源？ [英] How to declare a rails resource with a parameter for new action?

问题描述

我有一个名为 Entree 的模型，为此 new 操作需要一个参数，即另一个名为 Cave 的模型的ID。强>。我不想将Entree嵌套在Cave中，因为Cave已经被嵌套。

我所做的是在 routes.rb 中声明资源Entree，如下所示。 ：

I have a model named Entree for which the new action needs a parameter, the id of another model named Cave. I don't want to nest Entree in Cave since Cave is already nested.
What I did was declaring the resource Entree as follow in routes.rb:

resources :entrees, :except => [:new]
match "/entrees/new/:id", :to => "Entrees#new", :as => 'new_entree'

可以，但是问题是当 create 操作，我要使用无效输入再次显示该页面。但是由于没有 new 操作，因此我必须执行 redirect_to new_entree_path ，这不会保留用户的输入。

That works, but the problem is when there's an error in the create action, I want to display the page again with the invalid input. But since there's no new action, I must do a redirect_to new_entree_path, which does not keep the user input.

我尝试了以下（最简单的）路线：

I have tried the following (simplest) route:

resources :entrees

但是路径 http：// localhost：3000 / entrees / new / 32 返回错误：

没有路线匹配[GET] / entrees / new / 32

问题是，如何使用 new 操作？

The question is, how can I declare the Entree resource in the routes file with a parameter for the new action ?

推荐答案

我不确定这是否是黑客，但是以下方法可以解决似乎比2级嵌套更干净。

I'm not sure if that's a hack or not, but the following works and seems cleaner than 2-levels nesting.

resources :entrees, :except => [:new] do
  collection do
    get 'new/:id', :to => "entrees#new", :as => 'new'
  end
end

现在我可以做一个呈现新 ，而不是 redirect_to 。
我必须说我一定是问错了我的问题，我的坏。

Now I can do a render "new" instead of a redirect_to. I must say that I must have asked my question wrongly, my bad.

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