Rails:嵌套资源冲突,如何根据被调用的路由确定索引操作的范围

在Rails中，嵌套资源的路由冲突可能会导致问题。要根据被调用的路由确定索引操作的范围，可以使用以下方法：

在config/routes.rb文件中，使用shallow关键字来定义嵌套资源路由。这将允许您在不包含父资源的情况下直接访问子资源。例如：

shallow do

 resources :posts do

   resources :comments

end

end

这将生成以下路由：

post_comments GET /posts/:post_id/comments(.:format) comments#index

             POST   /posts/:post_id/comments(.:format)          comments#create

new_post_comment GET /posts/:post_id/comments/new(.:format) comments#new

edit_post_comment GET /posts/:post_id/comments/:id/edit(.:format) comments#edit

   post_comment GET    /posts/:post_id/comments/:id(.:format)      comments#show

             PATCH  /posts/:post_id/comments/:id(.:format)      comments#update

             PUT    /posts/:post_id/comments/:id(.:format)      comments#update

             DELETE /posts/:post_id/comments/:id(.:format)      comments#destroy

        posts GET    /posts(.:format)                            posts#index

             POST   /posts(.:format)                            posts#create

     new_post GET    /posts/new(.:format)                        posts#new

    edit_post GET    /posts/:id/edit(.:format)                   posts#edit

         post GET    /posts/:id(.:format)                        posts#show

             PATCH  /posts/:id(.:format)                        posts#update

             PUT    /posts/:id(.:format)                        posts#update

             DELETE /posts/:id(.:format)                        posts#destroy

这样，您可以根据被调用的路由来确定索引操作的范围。

在config/routes.rb文件中，使用scope关键字来定义嵌套资源路由。同时，使用as关键字来定义路由名称。例如：

scope '/posts/:post_id' do

 resources :comments, as: 'post_comments'

end

这将生成以下路由：

post_comments GET /posts/:post_id/comments(.:format) comments#index

             POST   /posts/:post_id/comments(.:format)          comments#create

new_post_comment GET /posts/:post_id/comments/new(.:format) comments#new

edit_post_comment GET /posts/:post_id/comments/:id/edit(.:format) comments#edit

   post_comment GET    /posts/:post_id/comments/:id(.:format)      comments#show

             PATCH  /posts/:post_id/comments/:id(.:format)      comments#update

             PUT    /posts/:post_id/comments/:id(.:format)      comments#update

             DELETE /posts/:post_id/comments/:id(.:format)      comments#destroy

这样，您可以根据被调用的路由来确定索引操作的范围。

通过使用上述方法，您可以根据被调用的路由来确定索引操作的范围，从而避免嵌套资源冲突。

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