在Heroku生产环境中不存在Ruby on Rails应用程序页面

Question

在我的应用程序在localhost测试期间，我可以点击一个链接，将我带到edit_event_path(event)页面，并且它完美地工作。

当我把它推到Heroku的我不断收到错误“此页面不存在”但是我仍然能够访问/event索引页。

它只是似乎是编辑页面。

我的routes.rb

Rails.application.routes.draw do 
    resources :approvals 
    devise_for :users 
    resources :events 

    resources :roles 
    # The priority is based upon order of creation: first created -> highest priority. 
    # See how all your routes lay out with "rake routes". 

    scope "/admin" do 
    resources :users do 
     collection do 
     match 'update_collection', via: [:put, :patch] 
     end 
    end 
    end 
    # You can have the root of your site routed with "root" 
    root 'events#index' 

    # Example of regular route: 
    # get 'products/:id' => 'catalog#view' 

    # Example of named route that can be invoked with purchase_url(id: product.id) 
    # get 'products/:id/purchase' => 'catalog#purchase', as: :purchase 

    # Example resource route (maps HTTP verbs to controller actions automatically): 
    # resources :products 

    # Example resource route with options: 
    # resources :products do 
    #  member do 
    #  get 'short' 
    #  post 'toggle' 
    #  end 
    # 
    #  collection do 
    #  get 'sold' 
    #  end 
    # end 

    # Example resource route with sub-resources: 
    # resources :products do 
    #  resources :comments, :sales 
    #  resource :seller 
    # end 

    # Example resource route with more complex sub-resources: 
    # resources :products do 
    #  resources :comments 
    #  resources :sales do 
    #  get 'recent', on: :collection 
    #  end 
    # end 

    # Example resource route with concerns: 
    # concern :toggleable do 
    #  post 'toggle' 
    # end 
    # resources :posts, concerns: :toggleable 
    # resources :photos, concerns: :toggleable 

    # Example resource route within a namespace: 
    # namespace :admin do 
    #  # Directs /admin/products/* to Admin::ProductsController 
    #  # (app/controllers/admin/products_controller.rb) 
    #  resources :products 
    # end 
end 

Heroku的日志

2016-02-07T18:10:42.416537+00:00 app[web.1]: [2016-02-07 18:10:42] INFO WEBrick 1.3.1 
    2016-02-07T18:10:42.417158+00:00 app[web.1]: [2016-02-07 18:10:42] INFO WEBrick::HTTPServer#start: pid=3 port=33086 
    2016-02-07T18:10:42.416617+00:00 app[web.1]: [2016-02-07 18:10:42] INFO ruby 2.2.4 (2015-12-16) [x86_64-linux] 
    2016-02-07T18:10:42.689042+00:00 heroku[web.1]: State changed from starting to up 
    2016-02-07T18:10:44.112872+00:00 heroku[router]: at=info method=GET path="/" host=rocky-garden-45285.herokuapp.com request_id=68c4f973-c80d-4c5a-8fcb-b0278f2cbf91 fwd="31.54.189.126" dyno=web.1 connect=1ms service=270ms status=200 bytes=3966 
    2016-02-07T18:10:44.310780+00:00 heroku[router]: at=info method=GET path="/assets/application-f963057a4622f6dd81c09aa4b5984113c498b7784f67dfc6ef8bff81e17352df.css" host=rocky-garden-45285.herokuapp.com request_id=9fae1fe7-dceb-451a-836f-e52cda494151 fwd="31.54.189.126" dyno=web.1 connect=0ms service=23ms status=304 bytes=133 
    2016-02-07T18:10:44.535082+00:00 heroku[router]: at=info method=GET path="/assets/application-6abdf7298b102105c44b987e39846d7496e6a9c5e36a3eac9c8e68189eaa9865.js" host=rocky-garden-45285.herokuapp.com request_id=759a6a46-fe88-4db6-8c09-d79a1a9d005d fwd="31.54.189.126" dyno=web.1 connect=0ms service=22ms status=304 bytes=133 
    2016-02-07T18:10:45.045464+00:00 heroku[router]: at=info method=GET path="/assets/submit.png" host=rocky-garden-45285.herokuapp.com request_id=32c0080b-4eea-493a-a49a-73a517d5339d fwd="31.54.189.126" dyno=web.1 connect=0ms service=90ms status=304 bytes=343 
    2016-02-07T18:10:45.061932+00:00 heroku[router]: at=info method=GET path="/assets/pencil.png" host=rocky-garden-45285.herokuapp.com request_id=b05f2f39-6f94-44a7-89e7-1a4cd20d2afb fwd="31.54.189.126" dyno=web.1 connect=1ms service=302ms status=304 bytes=343 
    2016-02-07T18:10:45.042709+00:00 heroku[router]: at=info method=GET path="/assets/doc.png" host=rocky-garden-45285.herokuapp.com request_id=efaa4827-c548-485f-8d82-e98313823573 fwd="31.54.189.126" dyno=web.1 connect=0ms service=303ms status=304 bytes=343 
    2016-02-07T18:10:48.512052+00:00 heroku[router]: at=info method=GET path="/events/1/edit" host=rocky-garden-45285.herokuapp.com request_id=72bfc70a-ef5b-401b-9b62-cf7f1f2f14c1 fwd="31.54.189.126" dyno=web.1 connect=0ms service=22ms status=404 bytes=1829 
    2016-02-07T18:10:48.644811+00:00 heroku[router]: at=info method=GET path="/events/1/edit" host=rocky-garden-45285.herokuapp.com request_id=64f69780-d399-4f81-9354-b7998b98afb2 fwd="31.54.189.126" dyno=web.1 connect=1ms service=12ms status=404 bytes=1829 
    2016-02-07T18:10:52.675030+00:00 heroku[router]: at=info method=GET path="/events/1/edit" host=rocky-garden-45285.herokuapp.com request_id=50101311-033a-4dda-a4fb-c750144f8685 fwd="31.54.189.126" dyno=web.1 connect=1ms service=13ms status=404 bytes=1829 
    2016-02-07T18:10:52.805759+00:00 heroku[router]: at=info method=GET path="/events/1/edit" host=rocky-garden-45285.herokuapp.com request_id=0b665b71-6949-47da-9061-78d7a9014b3a fwd="31.54.189.126" dyno=web.1 connect=0ms service=11ms status=404 bytes=1829 

EventsController

class EventsController < ApplicationController 
    before_filter :authenticate_user! 
    before_action :set_event, only: [:show, :edit, :update, :destroy] 
    before_action :set_users 
    before_action :set_user, except: [:index] 

    # GET /events 
    # GET /events.json 
    def index 
    @events = Event.where(:approved => true) 
    @users = User.all.order("created_at DESC") 
    end 

    # GET /events/1 
    # GET /events/1.json 
    def show 
    end 

    # GET /events/new 
    def new 
    @event = Event.new 
    end 

    # GET /events/1/edit 
    def edit 
    end 

    # POST /events 
    # POST /events.json 
    def create 
    @event = Event.new(event_params) 

    respond_to do |format| 
     if @event.save 
     format.html { redirect_to @event, notice: 'Event was successfully created.' } 
     format.json { render :show, status: :created, location: @event } 
     else 
     format.html { render :new } 
     format.json { render json: @event.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # PATCH/PUT /events/1 
    # PATCH/PUT /events/1.json 
    def update 
    respond_to do |format| 
     if @event.update(event_params) 
     format.html { redirect_to @event, notice: 'Event was successfully updated.' } 
     format.json { render :show, status: :ok, location: @event } 
     else 
     format.html { render :edit } 
     format.json { render json: @event.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # DELETE /events/1 
    # DELETE /events/1.json 
    def destroy 
    @event.destroy 
    respond_to do |format| 
     format.html { redirect_to events_url, notice: 'Event was successfully destroyed.' } 
     format.json { head :no_content } 
    end 
    end 

    private 
    # Use callbacks to share common setup or constraints between actions. 
    def set_event 
     @event = Event.find(params[:id]) 
    end 

    def set_user 
     @user = User.find(params[:id]) 
    end 

    def set_users 
     @users = User.all.order("created_at DESC") 
    end 

    # Never trust parameters from the scary internet, only allow the white list through. 

    def event_params 
     params.require(:event).permit(:name, :user_id) 
    end 
end 

我不知道是否有任何其他日志或如需要回答我的问题，但如果你评论我会提供给他们！谢谢！

Answer 1

您的代码看起来不错 - 很可能没有Event ID为1.无论你有没有在生产中创建任何再或者你已经删除了它。 /events/1也可能是404。

转到/events/new创建Event。您也可以登录到您的Heroku数据库heroku pg:psql（假设你已经安装了toolbelt）和SELECT id FROM events，以验证其ID是否存在。

您还在使用params[:id]正在加载@user，这是Event的ID。如果User不存在与Event相同的ID，则Rails引发异常，这是404的异常。它看起来像您在此应用程序中登录过，因此您可能想要从session[:user_id]，通过Devise加载，或者你建立了认证。