Rails命名空间与嵌套资源 [英] Rails Namespace vs. Nested Resource

问题描述

假设我的应用有两种模型，即Foo和Bar.

Let's say my app has two models, Foo and Bar.

Foo(可选)belongs_to Bar.

Foo optionally belongs_to Bar.

现在，我可以查看单个Foo，或搜索特定的Foo，然后FoosController会处理所有这些.我的网址就像: foos/1和foos/new

Right now I can look at a single Foo, or search for a particular Foo, and the FoosController handles all that. My URLS are like: foos/1 and foos/new

有时候我想看看酒吧. BarsController可以处理此问题，而我得到的像是: bars/1或bars/1/edit.

Sometimes I want to look at a Bar. The BarsController handles that, and I get to it like: bars/1 or bars/1/edit.

如果我正在查看一个栏，则可能要浏览该栏的所有Foos.因此，我想使用bars/1/foos/来查看那些Foos.

If I'm looking at a Bar I might want to browse all the Foos that are part of that Bar. So, I'd like to use bars/1/foos/ to look at those Foos.

这对于嵌套资源非常简单，看起来像这样:

This is pretty straightforward with nested resources, and it looks like this:

resources :foo
resources :bar do
  resources :foo
end

但是，作为酒吧一部分的Foos与常规的Foos有所不同.因此，例如，如果我加载foos/1或bars/1/foos/1，则我将查看同一Foo，但是在每种情况下，我专注于不同的信息.

However, Foos that are part of a Bar are kind of special, set apart from regular Foos. So, for instance, if I load foos/1 or bars/1/foos/1, I would be looking at the same Foo, but I am focused on different information in each case.

因此，我一直在考虑让BarFoos控制器在Bar上下文中处理Foos.但是，如果我将BarFoos嵌套在Bar下，那么我的助手将像bar_bar_foos_path和new_bar_bar_foo_path一样.这似乎是多余的.

So I've been thinking about having a BarFoos Controller to handle Foos when they're in the context of a Bar. However, if I nest BarFoos under Bar, then my helpers are going to be like bar_bar_foos_path and new_bar_bar_foo_path. That seems redundant.

因此，现在我正在考虑名称空间，这是我之前从未研究过的.我在rails指南中看到可以定义的内容:

So, now I'm thinking about namespaces, which is something I've never looked into before. I see in the rails guide that I could define:

namespace "bar" do
  resources :foos
end

如果这样做，我可以在app/bar/下创建第二个FoosController，并且FoosController可以使用诸如bar_foo_path(:id)而不是bar_bar_foo_path(:id)的好帮手在Bar内部处理Foos.

If I do that I can make a second FoosController under app/bar/, and that FoosController can handle Foos inside of a Bar with nice helpers like bar_foo_path(:id) instead of bar_bar_foo_path(:id).

但是，如果我这样做了，我的BarsController会怎样?如果我有namespace "bar"而不是resources :bars，如何将请求路由到BarsController?

But if I do that, what happens to my BarsController? How do requests get routed to BarsController if instead of resources :bars I have namespace "bar"?

最后，我在二级FoosController中需要做些特别的事情以确保与顶级FoosController不会发生名称冲突吗?我意识到路由说命名空间"，但是红宝石代码的其余部分如何知道app/bar/foos_controller和app/foos_controller不是同一类?

And, lastly, is there anything special I need to do inside my secondary FoosController to make sure there's not a name conflict with the top-level FoosController? I realize the routing says "namespace", but how does the rest of the ruby code know that the app/bar/foos_controller and app/foos_controller are not the same class?

谢谢！

推荐答案

我认为您要实现的目标是:

I think what you're trying to achieve is:

1. 酒吧有很多
2. 查看属于Bar的Foos
3. 查看所有Foos，无论其父级如何.

您可以通过以下方法实现: routes.rb:

You can achieve that with: routes.rb:

resources :foos
resources :bars do
  resources :foos, :controller => 'bars/foos'
end

您最终得到的路线帮助者是:

The route helpers you end up with are:

• bars_path
• foos_path
• bars_foos_path
• 等，等等，其余为耙路" =)

• bars_path
• foos_path
• bars_foos_path
• etc, etc, 'rake routes' for the rest =)

从本质上讲，您最终得到:

In essence, you end up with:

• app/BarsController(导轨g控制器栏)
• app/FoosController(用于g控制器foos)
• app/bars/FoosController(rails g控制器bar/foos)

在FoosController中，您将照常通过以下方式访问foos:

In FoosController, you would access foos as usual with:

@foos = Foos.all

在bar/FoosController中，您将使用以下命令访问bar的foos:

and in bars/FoosController, you would access bar's foos with:

@foos = @bar.foos

可以使用以下命令在bar/foos控制器中预先检索bar:

where bar can be pre-retrieved in the bars/foos controller with:

before_filter :get_client

private
def get_client
  @bar = Bar.find(params[:bar_id])
end

希望这会有所帮助. =)

Hope this helps. =)

修改: 至于命名空间路由，当我从子路径中检索到一些资源时，我就亲自使用它们.例如，如果我的网站上有一个管理"部分，则可能具有以下内容:

Edit: As for namespaced routes, I've personally used them when I some of my resources retrieved from a sub-path. For example, if I have an admin section of my site, then I might have the following:

routes.rb:

routes.rb:

namespace :admin do
  resources :foos
end

然后我用以下命令创建控制器:

and I create my controller with:

rails g controller admin/foos

这将设置我的foos资源，以便我可以在我的网站网址"/admin/foos中访问它，并获得诸如admin_foos_path之类的帮助程序.

This sets up my foos resource, such that I can access it at "my site url"/admin/foos, and also get helpers such as admin_foos_path.

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