windows 耙子资产：预编译不起作用（rails 3.1.1）
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rake assets:precompile doesn't work (rails 3.1.1)
提问by Nick Ginanto
I am deploying to heroku yet I saw that the css files aren't being served (they also cannot be found on heroku).
我正在部署到 heroku，但我看到没有提供 css 文件（它们也无法在 heroku 上找到）。
I read that I need to do rake assets:precompile locally at first yet when I do it I get:
我读到我需要做 rake 资产：首先在本地预编译，但当我这样做时，我得到：
C:\project>bundle exec rake assets:precompile --trace
** Invoke assets:precompile (first_time)
** Execute assets:precompile
rake aborted!
undefined: Unexpected token: operator (<)
(in C:/project/app/assets/javascripts/application.js)
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)
I have nothing in application.js so I don't understand where the error is..
我在 application.js 中什么都没有，所以我不明白错误在哪里..
application.js is
application.js 是
// This is a manifest file that'll be compiled into including all the files listed below.
// Add new JavaScript/Coffee code in separate files in this directory and they'll automatically
// be included in the compiled file accessible from http://example.com/assets/application.js
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
//= require jquery
//= require jquery_ujs
//= require_tree .
Thank you
谢谢
Update
更新
If removing a .js.erb file I get the following error
如果删除 .js.erb 文件，我会收到以下错误
C:\project>bundle exec rake assets:precompile RAILS_ENV=production --trace
** Invoke assets:precompile (first_time)
** Execute assets:precompile
rake aborted!
706: unexpected token at 'C:\Users\me\AppData\Local\Temp\execjs20111021-6448-ei2nm3.js(2, 3) Microsoft JScript runtime error: Out of memory
'
(in C:/project/app/assets/javascripts/application.js)
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)
Still have problems with erb css and js files not compiling...
仍然有 erb css 和 js 文件无法编译的问题...
This doesn't seem to end.. Thanks
这似乎还没有结束..谢谢
采纳答案by u445908
I think it is caused by an external javascript file which is not well-code-formatted. e.g.
我认为这是由代码格式不正确的外部 javascript 文件引起的。例如
function say_hi(){
// NOTICE that there's no semi-colon there!
name = "Jim"
alert("hi" + name )
}
when under the precompile, your code would put in 1 line, and since there's no necessary semicolon, your generated js file probably contains errors, like
在预编译下，您的代码将放在 1 行中，并且由于没有必要的分号，因此您生成的 js 文件可能包含错误，例如
"undefined: Unexpected token: operator (<)"
or something.
或者其他的东西。
so, my suggestion is:
所以，我的建议是：
don't compress the js file if it's not well code-formatted, by setting "config.assets.compress = false" in your config file, following @Mike's answer.
use coffeescript as possible, it will help you generate very well formatted code. ( I am not a coffeescript guru, so please correct me if I am wrong )
如果代码格式不正确，请不要压缩 js 文件，方法是在您的配置文件中设置“config.assets.compress = false”，按照@Mike 的回答。
尽可能使用coffeescript，它将帮助您生成格式良好的代码。（我不是咖啡大师，所以如果我错了，请纠正我）
回答by Mike
I've been struggling with this trying to deploy to a staging server. The solution that works for me is to make sure you have the following in your config/environments/[your_environment].rbfile:
我一直在努力尝试部署到登台服务器。对我有用的解决方案是确保您的config/environments/[your_environment].rb文件中有以下内容：
config.assets.compress = false
By default, the compressors aren't available in environment other than production, which is why the precompile was failing.
默认情况下，压缩器在生产环境以外的环境中不可用，这就是预编译失败的原因。
回答by Carlosin
I have the same issue here! In my case, what causes this issue is that, I add a new JS file to javascript folder, and I got an undefined: Unexpected token: operator (<)error while I tried to run precompile command. So I look into the new js file and found there is a HTML style comment <!-- -->in that file. I remove it and life is good now!
我这里也有同样的问题！就我而言，导致此问题的原因是，我向 javascript 文件夹添加了一个新的 JS 文件，undefined: Unexpected token: operator (<)但在尝试运行预编译命令时出现错误。所以我查看了新的 js 文件，发现该文件中有一个 HTML 样式的注释<!-- -->。我删除它，现在生活很好！
So try to find out is there any HTML style comment <!-- -->in your js file and just remove those comments. This is especially true when some JS code is copied from html file!
所以试着找出<!-- -->你的 js 文件中是否有任何 HTML 样式的注释，然后删除这些注释。当一些 JS 代码从 html 文件中复制时尤其如此！
回答by rudygodoy
I was having the same issue and it turned out to be caused by the inclusion of a embed javascript which had comments in the format: <!-- comment -->I've removed them and it worked like a charm! Hopefully this helps.
我遇到了同样的问题，结果证明它是由包含格式注释的嵌入 javascript 引起的：<!-- comment -->我已经删除了它们，它就像一个魅力！希望这会有所帮助。
回答by Saurabh Nanda
I've spent the last 1 hour scratching my head after encountering the same bug. The problem is the following line in your application.js:
在遇到同样的错误后，我花了最后 1 个小时摸不着头脑。问题是 application.js 中的以下行：
//= require_tree .
This causes all files in your app/assets/javascripts/directory to get included and it couldbe that there is some sort of bug in another file in the directory. I removed that line and got my assets to precompile (I wasn't really using application.js). So, look for a bug in a file being included by application.js
这会导致您app/assets/javascripts/目录中的所有文件都被包含在内，并且可能是该目录中的另一个文件中存在某种错误。我删除了该行并让我的资产进行预编译（我并没有真正使用 application.js）。因此，在包含的文件中查找错误application.js
回答by Tilo
one thing I noticed is that it should be:
我注意到的一件事是它应该是：
RAILS_ENV=production bundle exec rake assets:precompile
the definition of the RAILS_ENV needs to go before the bundlecommand, because it's setting the shell (bash) environment variable for the shell that executes the bundlecommand.
RAILS_ENV 的定义需要放在bundle命令之前，因为它正在为执行bundle命令的 shell 设置 shell (bash) 环境变量。
Your problems seems to be related to this:
您的问题似乎与此有关：
https://github.com/bradphelan/jasminerice/issues/21
https://github.com/bradphelan/jasminerice/issues/21
See also:
也可以看看：
http://guides.rubyonrails.org/asset_pipeline.html
http://guides.rubyonrails.org/asset_pipeline.html
Heroku rails 3.1 app - compiling assets locally vs compiling assets during slug compilation
Heroku rails 3.1 应用程序 - 在本地编译资产与在 slug 编译期间编译资产
回答by bbusche
I had a similar problem:
我有一个类似的问题：
Unexpected token: operator (<<)
意外标记：运算符 (<<)
This turned out to be a left over file from a merge conflict in Git. The conflict leaves a .orig file that contains "<<<<<<<<<<" wherever Git finds a block of code to be merged.
结果证明这是 Git 中合并冲突的遗留文件。冲突会在 Git 找到要合并的代码块的地方留下一个包含“<<<<<<<<<<<”的 .orig 文件。
Because of the asset pipeline directive
由于资产管道指令
//= require_tree .
//= require_tree .
in application.js, all files in the javascript folder (including .orig files) get precompiled on a push to servers like Heroku. The precompiler finds fault with the "<<<<<".
在application.js 中，javascript 文件夹中的所有文件（包括 .orig 文件）都会在推送到 Heroku 等服务器时进行预编译。预编译器发现“<<<<<”错误。
So my solution was to find all the .orig files and delete them from Git, using the 'git rm filename' method.
所以我的解决方案是使用 'git rm filename' 方法找到所有 .orig 文件并从 Git 中删除它们。
