JavaScript资产管道:404错误-如何在Rails中包含Google Analytics(分析)代码? [英] Javascript asset pipeline: 404 error - How to include Google analytics code in Rails?

问题描述

我正在尝试将Google Analytics(分析)添加到我的Rails应用程序中，但是Rails的资产管道存在问题.

I'm trying to include Google Analytics in my Rails app but am having problems with Rails its asset pipeline.

我创建了一个新文件(app/assets/javascripts/google-analytics.js)，其中包含了Google提供的Javascript代码.在application.html.erb中添加了以下行:javascript_include_tag 'google-analytics' if Rails.env.production?.

I created a new file (app/assets/javascripts/google-analytics.js) in which I included the Javascript code supplied by Google. To application.html.erb I added the line: javascript_include_tag 'google-analytics' if Rails.env.production?.

不幸的是，它在生产中不起作用.推送到Heroku之后，源代码包括:<script src="/javascripts/google-analytics.js"></script>.但是它找不到javascript文件，即，如果我在源代码中单击此链接，它将产生404错误页面.我在做什么错了?

Unfortunately it doesn't work in production. After pushing to Heroku, the source code includes: <script src="/javascripts/google-analytics.js"></script>. But it can't find the javascript file, i.e., if I click this link in the source code it produces the 404 error page. What am I doing wrong?

更新:如果我将Rails.application.config.assets.precompile += ['google-analytics.js']添加到production.rb，则可以使用.如果我将此行添加到assets.rb而不是production.rb，它现在可以正常工作.我希望将其放置在assets.rb中以保持其整洁.有谁知道为什么它不能与assets.rb一起使用?

Update: It works if I add Rails.application.config.assets.precompile += ['google-analytics.js'] to production.rb. It does now work if I add this line to assets.rb instead of production.rb. I would prefer to place it in assets.rb to keep it uncluttered. Does anyone understand why it isn't working with assets.rb?

将JS文件直接包含在文件夹/public/assets/google-analytics.js中是否是一个很好的选择?然后，我不需要将文件包含在/app/assets/javascripts/google-analytics.js中，也就不需要在production.rb或assets.rb中使用预编译行了?

Would it be a good alternative to directly include the JS file in the folder /public/assets/google-analytics.js? Then I wouldn't need to include the file in /app/assets/javascripts/google-analytics.js and I wouldn't need the precompile lines in production.rb or assets.rb?

更新前的Heroku日志尾巴:

Heroku log tail before update:

heroku[router]: at=info method=GET path="/assets/application-1d520c66bc88***583e462611.css" host=***.herokuapp.com request_id=***  fwd="***" dyno=web.1 connect=0ms service=2ms status=304 bytes=93
heroku[router]: at=info method=GET path="/assets/application-2b1c01f66fb87e***bd707657bc1acf7.js" host=***.herokuapp.com request_id=*** fwd="***" dyno=web.1 connect=1ms service=2ms status=304 bytes=93
heroku[router]: at=info method=GET path="/javascripts/google-analytics.js" host=***.herokuapp.com request_id=*** fwd="***" dyno=web.1 connect=1ms service=4ms status=404 bytes=1708
app[web.1]: Started GET "/javascripts/google-analytics.js" for *** at 2015-07-15 11:11:23 +0000
app[web.1]: ActionController::RoutingError (No route matches [GET] "/javascripts/google-analytics.js"):
app[web.1]:   vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
etc.

推荐答案

Rails系统需要知道该文件的预编译. 默认情况下，它与application.js一起使用，但是如果您创建一个新的清单文件，则必须包含它.

Rails system needs to know pre-compilation of that file. By default it works with application.js but if you create a new manifest file, you have to include it.

在config/initializers/assets.rb或production.rb中添加以下行:

Rails.application.config.assets.precompile << ['google-analytics.js']

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