獲取NoMethodError：未定義的ROR方法錯誤

Question

使用ROR運行命令rake routes時出現以下錯誤。

Error:

NoMethodError: undefined method `resources' for nil:NilClass 
C:/Sites/bookshelf/config/routes.rb:4:in `block (2 levels) in <top (required)>' 
C:/Sites/bookshelf/config/routes.rb:3:in `block in <top (required)>' 
C:/Sites/bookshelf/config/routes.rb:1:in `<top (required)>' 
C:in `execute_if_updated' 
C:/Sites/bookshelf/config/environment.rb:5:in `<top (required)>' 
Tasks: TOP => routes => environment 
(See full trace by running task with --trace) 

我下面解釋我的代碼。

Rails.application.routes.draw do 
     root 'books#index' 
     resources :books do |book| 
      book.resources :comments, :only => :create 
     end 
end 

請幫我解決這個錯誤。

Answer 1

Rails.application.routes.draw do 
     root 'books#index' 
     resources :books do 
      resources :comments, :only => :create 
     end 
end