具有可选参数优先级的Rails路由

Question

我的路线文件里有个奇怪的问题。这是我需要明白的部分，这条路不起作用

  # V3
  # V3 - Home Page
  match '/:locale' => 'v3/home#index', :constraints => V3Constraint, :as => :home
  # V3 - Search
  match '(/:locale)/products/search' => 'v3/products#search', :constraints => V3Constraint
  # V3 - Categories index
  match '(/:locale)/categories/(:parent_category((/*path)/:category))/(:full)' => 'v3/products#index', :constraints => V3Constraint, :as => :category
  # V3 - Prduct Page
  match '/:locale/products/:product' => 'v3/products#show', :constraints => V3Constraint, :as => :product
  match '(/:locale)/search_amazon' => 'v3/products#search_amazon', :constraints => V3Constraint
  # EOF V3

但这份工作

#V3 - Search
  match '(/:locale)/products/search' => 'v3/products#search', :constraints => V3Constraint
  # V3 - Categories index
  match '(/:locale)/categories/(:parent_category((/*path)/:category))/(:full)' => 'v3/products#index', :constraints => V3Constraint, :as => :category
  # V3 - Product Page
  match '/:locale/products/:product' => 'v3/products#show', :constraints => V3Constraint, :as => :product
  match '(/:locale)/search_amazon' => 'v3/products#search_amazon', :constraints => V3Constraint
  # V3 - Home Page
  match '/:locale' => 'v3/home#index', :constraints => V3Constraint, :as => :home

如果我使主页路由比其他路由具有更低的优先级，那么它可以工作，但是如果它与其他路由一样位于顶部: match '(/:locale)/search_amazon‘=> 'v3/products#search_amazon'，：=> V3Constraint将导致主页。

有谁能解释一下为什么要发生这种事吗？

谢谢。

Answer 1

拥有这样的路由，<yourdomain>/search_amazon将匹配这两条路由中的第一条

match '(/:locale)/search_amazon' => 'v3/products#search_amazon', :constraints => V3Constraint

在本例中，它将匹配，因为locale在这里是可选的。

match '/:locale' => 'v3/home#index', :constraints => V3Constraint, :as => :home

在这里，它将匹配使search_amazon作为locale的值。