Ruby on Rails：localhost：3000 / my_pages_dont_show_up
[英]Ruby on Rails: localhost:3000/my_pages_dont_show_up
问题描述
When I 'rails server' the localhost:3000 works in my browser (chrome). 
当我'运行服务器'时，localhost：3000在我的浏览器中运行（chrome）。 Here's the term: 这是一个术语：
tom@toms-ubuntu:~/rails_projects/routesapp$ rails s
=> Booting WEBrick
=> Rails 3.2.16 application starting in development on http://localhost:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2016-01-12 10:56:27] INFO WEBrick 1.3.1
[2016-01-12 10:56:27] INFO ruby 1.9.3 (2013-11-22) [x86_64-linux]
[2016-01-12 10:56:27] INFO WEBrick::HTTPServer#start: pid=4751 port=3000
But for localhost:3000/page/home the browser displays: 但对于localhost：3000 / page / home，浏览器显示：
NoMethodError in Page#home
Showing /home/tom/rails_projects/routesapp/app/views/layouts/application.html.erb where line #5 raised:
undefined method `[]' for nil:NilClass
Extracted source (around line #5):
2: <html>
3: <head>
4: <title>Routesapp</title>
5: <%= stylesheet_link_tag "application", :media => "all" %>
6: <%= javascript_include_tag "application" %>
7: <%= csrf_meta_tags %>
8: </head>
Rails.root: /home/tom/rails_projects/routesapp Rails.root：/ home / tom / rails_projects / routesapp
Application Trace | 应用程序跟踪| Framework Trace | 框架跟踪| Full Trace app/views/layouts/application.html.erb:5:in `_app_views_layouts_application_html_erb___1001173571477850876_70164200470120' 完整跟踪应用/ views / layouts / application.html.erb：5：在`_app_views_layouts_application_html_erb___1001173571477850876_70164200470120'
I generated the html files shown in the routes.rb file below; 我生成了下面的routes.rb文件中显示的html文件; the html files are located in app/views/page html文件位于app / views / page中
Routesapp::Application.routes.draw do
get 'page/home'
get 'page/about'
get 'page/contact'
Any ideas, comments, suggestions will be much appreciated. 任何想法，意见和建议将不胜感激。 This is new to me. 这对我来说是新的。 Thanks 谢谢
2 个解决方案
解决方案1
2 2016-01-12 18:29:44
Since you're a beginner, let me explain. 既然你是初学者，请解释一下。
Your pages are showing; 您的页面正在显示; you've got an error: 你有一个错误：
undefined method `[]' for nil:NilClass
This is a standard Ruby error - it means undeclared variable . 这是一个标准的Ruby错误 - 它意味着未声明的变量 。
Since Ruby is Object Orientated , it assigns "nil" values to the NilClass -- meaning that you end up with strange errors. 由于Ruby是面向对象的 ，它为NilClass赋予“nil”值 - 意味着你最终会遇到奇怪的错误。
-- -
Normally, with debugging, you'll be able to reference the line number, and see what the issue is. 通常，通过调试，您将能够引用行号，并查看问题所在。
Because you've not included your view, I can only suggest that you try removing the following lines as a test : 因为您没有包含您的视图，所以我建议您尝试删除以下行作为测试 ：
5: <%= stylesheet_link_tag "application", :media => "all" %>
6: <%= javascript_include_tag "application" %>
If these work to resolve the issue, you'll have to either populate app/assets/javascripts/application.js or app/assets/stylesheets/application.css , or use something like nodeJS which works to resolve errors like this. 如果这些工作解决了这个问题，你必须填充app/assets/javascripts/application.js或app/assets/stylesheets/application.css ，或使用类似nodeJS东西来解决这样的错误。
You'll also be better using the following for your routes: 您还可以更好地使用以下路线：
#config/routes.rb
resources :pages, path: "page", only: [] do
%w(home about contact).each do |page|
get page
end
end
解决方案2
0 2016-03-18 11:22:43
好友将“应用程序”放在第5行和第6行，并将“应用程序”一词改为“默认”
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