我无法为一个模型定义Rails的“新”路径，该模型将一个参数传递给它将链接到的另一个模型。我们有遗留的URL结构，不幸的是
嵌套的resource路由在这里不起作用。
我想将“创建新评价”网址定义为/reviews/new/1234，其中1234是即将创建的book_id Review get '/reviews/:book_id' => 'reviews#index', :as => 'reviews_path'
get '/reviews/new/:book_id', :to => 'reviews#new', :as => 'new_review_path'
post '/reviews/:book_id' => 'reviews#create'
get '/reviews/:book_id/:id' => 'reviews#show'
get '/reviews/:book_id/:id/edit' => 'reviews#edit', :as => 'edit_review_path'
delete '/reviews/:book_id/:id' => 'reviews#destroy'
应该参考。
我的路线（为简洁而剪断）定义为：
rake routes | grep review reviews_path GET /reviews/:book_id(.:format) reviews#index
new_review_path GET /reviews/new/:book_id(.:format) reviews#new
POST /reviews/:book_id(.:format) reviews#create
GET /reviews/:book_id/:id(.:format) reviews#show
edit_review_path GET /reviews/:book_id/:id/edit(.:format) reviews#edit
DELETE /reviews/:book_id/:id(.:format) reviews#destroy
返回：
<%= link_to 'new review', new_review_path(book_id: @book.id) %>
在我的视图模板中，我有：
ActionView::Template::Error (undefined method `new_review_path' for #<#<Class:0x007f818f7117c8>:0x007f818f70e208>):
失败了：
Review为了完整性，我的class Review < ActiveRecord::Base
attr_accessible :book_id, :title, :content, :tags
belongs_to :book
end
模型如下：
{{1}}