Windows上的ExecJS :: RuntimeError试图遵循rubytutorial [英] ExecJS::RuntimeError on Windows trying to follow rubytutorial

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本文介绍了Windows上的ExecJS :: RuntimeError试图遵循rubytutorial的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

更新： Colin 建议删除该行// = require_tree 。我已经解决了这个问题。

UPDATE: Colin's suggestion of removing the line //= require_tree . has fixed the issue.

我浪费了2天时间，试图按照每个建议去解决我的问题。我试图在Windows机器上关注 http://ruby.railstutorial.org 一书并且不能在生命中使用我遇到了以下令人讨厌的错误。

I have wasted over 2 days trying to follow every suggestion out there and fix my issue. I am trying to follow the http://ruby.railstutorial.org book on windows machine and cannot for the life of me get past the following nasty error.

ExecJS::RuntimeError in Static_pages#home

Showing C:/Users/.../bootcamp-sample-app/app/views/layouts/application.html.erb where line #6 raised:

["ok","(function() {\n\n\n\n}).call(this);\n"]
(in C:/Users/.../bootcamp-sample-app/app/assets/javascripts/sessions.js.coffee)
Extracted source (around line #6):

3: <head>
4:   <title><%= full_title(yield(:title)) %></title>
5:   <%= stylesheet_link_tag    "application", media: "all" %>
6:   <%= javascript_include_tag "application" %>
7:   <%= csrf_meta_tags %>
8:   <%= render 'layouts/shim' %>
9: </head>
Rails.root: C:/Users/.../bootcamp-sample-app

Application Trace | Framework Trace | Full Trace
app/views/layouts/application.html.erb:6:in `_app_views_layouts_application_html_erb___487732698_30422172'
Request

我已经尝试了所有的建议，包括使用msc安装nodejs，使用execjs 1.3.0和其他我甚至不记得的东西。这是宝石文件

I have tried every suggestion including installing nodejs with the msi, using execjs 1.3.0 and other things which I can't even remember any more. Here is the gem file 

source 'https://rubygems.org'

gem 'rails', '3.2.8'
gem 'bootstrap-sass', '2.0.0'
gem 'bcrypt-ruby', '3.0.1'
gem 'faker', '1.0.1'
gem 'will_paginate', '3.0.3'
gem 'bootstrap-will_paginate', '0.0.6'

group :development, :test do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.10.0'
  gem 'guard-rspec', '0.5.5'
  gem 'guard-cucumber'
end

group :development do
  gem 'annotate', '2.5.0'
end


# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails'
  gem 'coffee-rails'
  gem 'coffee-script'
  gem 'uglifier'
end

gem 'jquery-rails', '2.0.2'

gem 'execjs'

# Gems on Linus/Mac
#gem 'therubyracer'


group :test do
  gem 'capybara', '1.1.2'
  gem 'guard-spork', '0.3.2'
  gem 'spork', '0.9.0'
  gem 'factory_girl_rails', '1.4.0'
  gem 'cucumber-rails', '1.2.1', require: false
  gem 'database_cleaner', '0.7.0'


# Test gems on Linux
#  gem 'rb-inotify', '0.8.8'
#  gem 'libnotify', '0.5.9'

# Test gems on Macintosh OS X
#  gem 'selenium-webdriver', '~> 2.22.0'
#  gem 'rb-fsevent', '0.9.1', :require => false
#  gem 'growl', '1.0.3'

# Test gems on Windows
# gem 'rb-fchange', '0.0.5'
# gem 'rb-notifu', '0.0.4'
# gem 'win32console', '1.3.0'
end

group :production do
#  gem 'therubyracer'
  gem 'pg', '0.12.2'
end

# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

# Use unicorn as the app server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger
#gem 'debugger''

这里是 sessions.js.coffee 

# Place all the behaviors and hooks related to the matching controller here.
# All this logic will automatically be available in application.js.
# You can use CoffeeScript in this file: http://jashkenas.github.com/coffee-script/

application.js 

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
// WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
// GO AFTER THE REQUIRES BELOW.
//
//= require jquery
//= require jquery_ujs
//= require_tree .
//= require bootstrap

application.html.erb 

<!DOCTYPE html>
 <html>
 <head>
   <title><%= full_title(yield(:title)) %></title>
   <%= stylesheet_link_tag    "application", media: "all" %>
   <%= javascript_include_tag "application" %>
   <%= csrf_meta_tags %>
   <%= render 'layouts/shim' %>
 </head>
 <body>
 <%= render 'layouts/header' %>
 <div class="container">
   <%= yield %>
   <%= render 'layouts/footer' %>
 </div>
 </body>
 </html>

这是控制台内容 

Processing by StaticPagesController#home as HTML
  Rendered static_pages/home.html.erb within layouts/application (45.0ms)
Completed 500 Internal Server Error in 1136ms

ActionView::Template::Error (["ok","(function() {\n\n\n\n}).call(this);\n"]
  (in C:/Users/.../bootcamp-sample-app/app/assets/javascripts/sessions.js.coffee)):
    3: <head>
    4:   <title><%= full_title(yield(:title)) %></title>
    5:   <%= stylesheet_link_tag    "application", media: "all" %>
    6:   <%= javascript_include_tag "application" %>
    7:   <%= csrf_meta_tags %>
    8:   <%= render 'layouts/shim' %>
    9: </head>
  app/views/layouts/application.html.erb:6:in `_app_views_layouts_application_html_erb___487732698_30422172'


  Rendered C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/_trace.erb (2.0ms)
  Rendered C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms)
  Rendered C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (34.0ms)

我已经安装了Devkit并尝试了各种宝石，但请提出可以帮助我在Windows上开发的更改。我用rubyinstaller作为一切。

I have installed Devkit and have tried various gems but please suggest changes which can help me develop on windows. I used rubyinstaller for everything.

我缺少什么？

推荐答案

我的朋友几个月前在Win 8 RTM上尝试了一个Rails教程并遇到了这个错误。不确定Windows 7中是否存在此问题，但这可能有所帮助。

My friend was attempting a Rails tutorial on Win 8 RTM a few months ago and ran into this error. Not sure if this issue exists in Windows 7 as well, but this may help.

选项：

1）删除 // = require_tree。 /忽略问题 - 正如ColinR上面所述，此行不应该导致首先是一个问题。 ExecJS在系统上运行JavaScript运行时存在实际问题，删除此行只是忽略了这一事实。

1) Removing //= require_tree . / Ignoring the issue - As ColinR stated above, this line should not be causing an issue in the first place. There is an actual problem with ExecJS working properly with the JavaScript runtime on your system and removing this line is just ignoring that fact.

2）安装Node.js /逃跑 - 许多人似乎最终安装了Node.js并使用它而不是已经在他们的系统上使用JavaScript运行时。虽然这是一个有效的选项，但它还需要额外的软件，并且只能避免原始问题，即ExecJS无法正常使用系统上的JavaScript运行时。如果您的系统上现有的JavaScript运行时应该可以工作，为什么不让它工作而不是安装更多软件？根据ExecJS创建者的说法，事实上已经支持Windows内置的运行时...

2) Installing Node.js / Running away - Many people seem to just end up installing Node.js and using that instead of the JavaScript runtime already on their system. While that is a valid option, it also requires additional software and only avoids the original issue, which is that ExecJS is not working properly with the JavaScript runtime already on your system. If the existing JavaScript runtime on your system is supposed to work, why not make it work instead of installing more software? According to the ExecJS creator, the runtime already built into Windows is in fact supported...


ExecJS允许您从Ruby运行JavaScript代码。它会自动选择可用于评估JavaScript程序的最佳运行时，然后将结果作为Ruby对象返回给您。

ExecJS lets you run JavaScript code from Ruby. It automatically picks the best runtime available to evaluate your JavaScript program, then returns the result to you as a Ruby object.

ExecJS支持这些运行时：

ExecJS supports these runtimes:


  • therubyracer - 嵌入Ruby的Google V8

  • therubyrhino - 嵌入JRuby的Mozilla Rhino

  • Node.js

  • Apple JavaScriptCore - 包含在Mac OS X中

  • Microsoft Windows脚本宿主（JScript）

  • therubyracer - Google V8 embedded within Ruby
  • therubyrhino - Mozilla Rhino embedded within JRuby
  • Node.js
  • Apple JavaScriptCore - Included with Mac OS X
  • Microsoft Windows Script Host (JScript)

（来自github.com/sstephenson/execjs#execjs）

(from github.com/sstephenson/execjs#execjs )

3）实际修复问题/学习 - 使用选项1和2的知识来搜索其他解决方案。在实际查找有关我们遇到的根本问题的信息之前，我无法告诉您在看到选项1或2是已接受的解决方案时关闭了多少个网页。我们一直关注的唯一原因是我们无法相信Rails团队会（1）在导致问题的每个脚手架生成的项目中插入一行代码，或者（2）要求我们安装其他软件以运行该默认值代码行。因此，我们最终找到了根本问题的修复程序（您的里程可能会有所不同）。

3) Actually fixing the issue / Learning - Use the knowledge of options 1 and 2 to search for other solutions. I can't tell you how many webpages I closed upon seeing options 1 or 2 was the accepted solution before actually finding information about the root issue we were having. The only reason we kept looking was that we couldn't believe the Rails team would (1) insert a line of code in every scaffold generated project that caused an issue, or (2) require that we install additional software just to run that default line of code. And so we eventually arrived at a fix for our root issue (your miles may vary).

修复程序对我们有用：
在遇到问题的系统上，找到ExecJS的 runtimes.rb 文件。它看起来像这个。制作找到的备份文件的副本。打开原始runtimes.rb进行编辑。找到以 JScript = ExternalRuntime.new（）行开头的部分。在该部分中，包含：command =>行的cscript / / E：jscript // Nologo // U， - 仅删除 // U 。然后在包含：encoding =>'UTF-16LE'＃CScript with // U返回UTF-16LE - 将UTF-16LE更改为 UTF-8 保存对文件的更改。现在该文件的这一部分应为：

The Fix that worked for us: On the system having issues, find ExecJS's runtimes.rb file. It looks like this. Make a copy of the found file for backup. Open the original runtimes.rb for editing. Find the section that starts with the line JScript = ExternalRuntime.new(. In that section, on the line containing :command => "cscript //E:jscript //Nologo //U", - remove the //U only. Then on the line containing :encoding => 'UTF-16LE' # CScript with //U returns UTF-16LE - change UTF-16LE to UTF-8 . Save the changes to the file. This section of the file should now read:

JScript = ExternalRuntime.new(
    :name        => "JScript",
    :command     => "cscript //E:jscript //Nologo",
    :runner_path => ExecJS.root + "/support/jscript_runner.js",
    :encoding    => 'UTF-8' # CScript with //U returns UTF-16LE
)

接下来，停止然后重新启动Rails服务器并刷新浏览器中产生原始错误的页面。希望页面现在加载没有错误。这是ExecJS问题线程我们最初发布的结果是： https://github.com/sstephenson/execjs/ issue / 81＃issuecomment-9892952

Next, stop then restart your Rails server and refresh the page in your browser that produced the original error. Hopefully the page loads without error now. Here's the ExecJS issue thread where we originally posted our results: https://github.com/sstephenson/execjs/issues/81#issuecomment-9892952

如果这不能解决问题，您可以随时用备份副本覆盖修改后的runtimes.rb（希望如此）制作，一切都将恢复原状。在这种情况下，请考虑选项3并继续搜索。让我们知道什么最终对你有用..除非它删除require_tree或安装node.js，已经有很多东西可以解决。 ：）

If this did not fix the issue, you can always overwrite the modified runtimes.rb with the backup copy you (hopefully) made and everything will be back to square one. In that case, consider option 3 and keep searching. Let us know what eventually works for you.. unless it's removing the require_tree or installing node.js, there's plenty of that going around already. :)

这篇关于Windows上的ExecJS :: RuntimeError试图遵循rubytutorial的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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