复制@idea，出现"No route matches“错误[rails]

Question

我正在创建一个应用程序，其中一个用户可以创建和@idea，然后另一个@用户可以‘分叉’@idea。为此，我使用了复制方法ActiveRecord::Core#dup。

这就是我想要发生的。@user打开@idea显示页面并单击一个图标，该图标将引导他/她进入一个新的@forked_idea编辑页面，该页面允许用户编辑原始的@idea并将其另存为新的@forked_idea。

这是我的展示页面上的原始@idea的片段。当图标被点击，我希望它路由到一个编辑页面(在或到的想法)

<%= link_to "<i class='fa fa-code-fork fa-5x'></i>".html_safe, idea_forked_idea_path(@idea), method: :get %>

当我单击图标以派生@idea时，出现以下错误：

ActionController::UrlGenerationError - No route matches {:action=>"update", :controller=>"forked_ideas", :format=>nil, :id=>nil, :idea_id=>#<Idea id: 78, 

下面是应用程序/controllers/ideas_Controler.rb

class ForkedIdeasController < ApplicationController

def edit
end

def update
  @idea = Idea.find(params[:id])
  @forked_idea = @idea.dup
  if @forked_idea.save(forked_idea_attributes)
    redirect_to forked_ideas_edit_path(@idea), notice: "Forking this idea!"
  else
    render ideas_path
  end   
end


def destroy
  if @idea.destroy
    redirect_to ideas_path, notice: "idea has been deleted"
  else
    redirect_to ideas_path, notice: "idea has been deleted"
  end
end

private

def forked_idea_attributes
  params.require(:forked_idea).permit([:title, :body, :tag_list, :image])
end

end

结束

我的forked_idea模型：

class ForkedIdea < ActiveRecord::Base

  belongs_to :user

路线

resources :ideas do
  resources :forked_ideas, only:[:edit, :update, :destroy]
end  

这是rake routes

edit_idea_forked_idea GET    /ideas/:idea_id/forked_ideas/:id/edit(.:format)    forked_ideas#edit
     idea_forked_idea PATCH  /ideas/:idea_id/forked_ideas/:id(.:format)         forked_ideas#update
                      PUT    /ideas/:idea_id/forked_ideas/:id(.:format)         forked_ideas#update
                      DELETE /ideas/:idea_id/forked_ideas/:id(.:format)         forked_ideas#destroy
                ideas GET    /ideas(.:format)                                   ideas#index
                      POST   /ideas(.:format)                                   ideas#create
             new_idea GET    /ideas/new(.:format)                               ideas#new
            edit_idea GET    /ideas/:id/edit(.:format)                          ideas#edit
                 idea GET    /ideas/:id(.:format)                               ideas#show
                      PATCH  /ideas/:id(.:format)                               ideas#update
                      PUT    /ideas/:id(.:format)                               ideas#update
                      DELETE /ideas/:id(.:format)                               ideas#destroy

Answer 1

会不会"id“是nil -给定你的错误消息：

ActionController::UrlGenerationError - No route matches {:action=>"update", :controller=>"forked_ideas", :format=>nil, :id=>nil, :idea_id=>#<Idea id: 78, 

而当"id“为nil时，你似乎没有路由。