ruby-on-rails - Rails，通过参数获取引擎控制器操作的 url

Question

我有两个独立的引擎Offer和Prices.

如何使用带有参数的哈希从 Offers 引擎视图中获取价格引擎控制器的 URL？

#config/routes.rb
Rails.application.routes.draw do
  mount Offers::Engine, at: "offers", as: "offers_routes"
  mount Prices::Engine, at: "prices", as: "prices_routes"
end

#offers/offers_controller.rb
class Offers::OffersController
  def show
  end
end

#prices/prices_controller.rb
class Prices::PricesController
  def index
  end
end

#views/offers/show.html.slim
= link_to "Prices", { action:"index", controller:"prices/prices" }

在这种情况下 link_to 引发错误：

*** ActionController::RoutingError Exception: No route matches {:controller=>"prices/prices"}

我知道offers_routes.offers_path助手，但在我的情况下，我应该使用带参数的哈希。

Answer 1

use_route如果您使用引擎路线，则必须传递参数。

= link_to "Prices", { action:"index", controller:"prices/prices", use_route:"prices_routes" }

源码链接：https ://github.com/rails/rails/blob/v3.2.13/actionpack/lib/action_dispatch/routing/route_set.rb#L442

但这是更明确的解决方案：

= link_to "Prices", prices_routes.url_for(action:"index", controller:"prices/prices")