ruby-on-rails - 为什么这种形式认为它应该路由到索引？

Question

我有一个 simple_form_for new_comment 导致浏览器中出现 undefined methodcomments_path'` 错误，当我只是尝试查看表单(而不是提交)时

_form.html.slim

= simple_form_for new_comment, :remote => true do |f|

这里是partial，所以传递的局部变量来自hacks scaffold的show page

show.html.slim - 技巧

= render partial: "comments/form", locals: { new_comment: @new_comment } if user_signed_in?

我在 hacks Controller 中定义了@new_comment

hacks_controller.rb

  def show
    @hack = Hack.find(params[:id])
    @comments = @hack.comment_threads.order('created_at DESC')
    @new_comment = Comment.build_from(@hack, current_user.id, "") if user_signed_in?
                           #build_from is a method provided by the acts_as_commentable_with_threading gem
  end

为什么 new_comment 想要路由到 comments_path？我什至没有提交表格。

routes.rb

  root 'hacks#index'

  concern :commentable do
    resources :comments, only: [:create, :update, :destroy]
  end

  resources :hacks, concerns: [:commentable]
  resources :users

  devise_for :users, :skip => [:sessions, :registration]
  devise_for :user,  :path => '', :path_names => { :sign_in => "login", 
                                                  :sign_out => "logout", 
                                                  :sign_up => "register", 
                                                  :account_update => "account-settings" }

Answer 1

由于您的评论嵌套在 hack 中，因此您需要评论和 hack。所以，试试这个

show.html.slim

= render partial: "comments/form", locals: { new_comment: @new_comment, hack: @hack } if user_signed_in?

_form.html.slim

= simple_form_for [hack, new_comment], :remote => true do |f|