Rails:如何使用带有参数的范围并使用带有默认参数值的路由 [英] Rails: how to use scope with params and use route with default value of params

问题描述

我在 routes.rb 中有这样的行:

I have such lines in routes.rb:

scope "/:subdomain/" do
  resource :order, :only => [:new, :create, :show, :update, :edit, :destroy] do
    get   :cancel,    :on => :member 
    put   :counter,   :on => :member 
  end
end

例如，这是典型的网址:http://mydomain.com/some_subdomain/order/new .此 url 映射到带有 params[:subdomain] = "some_subdomain" 的订单控制器的新操作.我想使用命名路由 new_order_url(:subdomain => "some_subdomain").

And for example, this is typical url: http://mydomain.com/some_subdomain/order/new . This url is mapped to action new of orders controller with params[:subdomain] = "some_subdomain". I want to use named route new_order_url(:subdomain => "some_subdomain").

但我想将 http://mydomain.com/order/new 映射到订单控制器，动作新和参数[:子域] =默认".我想对这样的 url 使用命名路由 new_order_url.

But I want to map http://mydomain.com/order/new to orders controller, action new and params[:subdomain] = "default". And I want to use named route new_order_url for such url.

这样做的最佳做法是什么?

What is the best practices to do it?

推荐答案

答案是使用()和默认值"

The answer is "use () and defaults"

scope "/(:subdomain)", :defaults => {:subdomain => "default"} do
  ...
end

http://guides.rubyonrails.org/routing.html#dynamic-segments 和 http://guides.rubyonrails.org/routing.html#defining-defaults

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