路由关注点定义了资源的不同参数 [英] Routing concerns defining different param for resources

问题描述

最近我从这次讨论中了解了路线中的铁轨问题
如何在路由中为命名空间和根路径完全使用一种资源-Rails 4 。现在在我的应用程序中，我有这样的路由：

Recently I got to know about rails concerns in routes from this discussion How to have one resource in routes for namespace and root path altogether - Rails 4. Now in my application I have routes like this:

namespace :admin do
  resources :photos
  resources :businesses
  resources :projects
  resources :quotes
end
resources :photos, param: 'slug'
resources :businesses, param: 'slug' do
  resources :projects, param: 'slug' #As I need both the url one inside business and one outside
end
resources :projects, param: 'slug'
resources :quotes, param: 'slug'

还有很多资源可以根据需要重复使用。我知道有关如何实施这些问题的知识。有了担心，我可以这样：

And there are many more resources which are repeating as I needed them. I know about concerns how to implement them. With the concerns I can do it like this:

concern :shared_resources do
  resources :photos
  resources :businesses
  resources :projects
  resources :quotes
end
namespace :admin do
  concerns :shared_resources
end
concerns :shared_resources

但是我如何每次都给不同的 param 担心吗？我尝试这样做：

but how can I give different param each time in the concerns? I tried doing it like this:

concerns :shared_resources, param: 'slug'

但这不会改变路线。如果我加上：

But this brings no change in the routes. And if I add:

resources :photos, param: 'slug'

然后它将添加到两条路由段中，而不是id中。但是在管理方面，我需要ID，在前端，我需要塞子。因此，有没有其他方法可以解决此问题，以便使代码干燥。

Then it will add to both the routes slug instead of id. But in admin side I need id and in front end I need slug. So are there any options to pass this in the concerns so to DRY up the code.

推荐答案

是的，我记得我曾对此有所了解。它不在Rails指南中，但是一个SO问题的答案令我有些惊讶。您可以使用一个block ：（从上述答案中引用）

Yes I remembered seeing something about this. It wasn't in the Rails guide, but an answer to a SO question that kinda surprised me. You can use a block : (quoted from the aforementionned answer)

在Rails 4中，您可以将选项传递给关注点。因此，如果您这样做：

In Rails 4 you can pass options to concerns. So if you do this:

# routes.rb
concern :commentable do |options|
  resources :comments, options
end

resources :articles do
  concerns :commentable, commentable_param: 'slug'
end

然后，当您倾斜路线时，您会看到一条类似

Then when you rake routes, you will see you get a route like

POST /articles/:id/comments, {commentable_param: 'slug'}

这篇关于路由关注点定义了资源的不同参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！