blocks|key|4691413|text|我昨天突然收到了这个奇怪的错误。Heroku确认做了一个update到Ruby构建包...|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4691414|这跟Rakefile有关。你的Rakefile需要什么文件吗？它需要你的应用程序文件吗？如果是这样，则应用程序在加载时不应在未设置任何配置变量的情况下引发异常。|4691415|这是违反直觉的，因为应用程序在没有配置变量设置的情况下永远不会运行。|4691416|在我的例子中，Sinatra应用程序在init文件中查找数据库urls：|4691417|uri+=+URI.parse(+ENV[+"REDISTOGO_URL"+])|code-block|syntax|javascript|4691418|如果没有设置env变量，这将引发异常。|4691419|您可能会遇到与其他数据库URL相同的问题，例如Mongo或Postgres。|4691420|因此，防止缺少env变量：|4691421|if++ENV[+"REDISTOGO_URL"+]
++uri+=+URI.parse(+ENV[+"REDISTOGO_URL"+])
++...|4691422|在推送到Heroku之前，你可以通过运行bundle+exec+rake+-P来检查它是否可以工作|style|CODE|4691423|此外，请确保在更新init后所有测试都通过。通过重新启动Spork或类似程序来删除任何缓存的init状态。|4691424|参考：Show+Rakefile+errors+in+Ruby+deploys|4691425|entityMap|0|LINK|mutability|MUTABLE|url|https://devcenter.heroku.com/changelog|1|https://devcenter.heroku.com/changelog-items/363^0|S|6|0|0|0|0|0|0|0|0|0|0|K|J|0|0|3|10|1|0^^$0|@$1|2|3|4|5|6|7|1E|8|@]|9|@$A|1F|B|1G|1|1H]]|C|$]]|$1|D|3|E|5|6|7|1I|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|1J|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|1K|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|1L|8|@]|9|@]|C|$M|N]]|$1|O|3|P|5|6|7|1M|8|@]|9|@]|C|$]]|$1|Q|3|R|5|6|7|1N|8|@]|9|@]|C|$]]|$1|S|3|T|5|6|7|1O|8|@]|9|@]|C|$]]|$1|U|3|V|5|L|7|1P|8|@]|9|@]|C|$M|N]]|$1|W|3|X|5|6|7|1Q|8|@$A|1R|B|1S|Y|Z]]|9|@]|C|$]]|$1|10|3|11|5|6|7|1T|8|@]|9|@]|C|$]]|$1|12|3|13|5|6|7|1U|8|@]|9|@$A|1V|B|1W|1|1X]]|C|$]]|$1|14|3|-4|5|6|7|1Y|8|@]|9|@]|C|$]]]|15|$16|$5|17|18|19|C|$1A|1B]]|1C|$5|17|18|19|C|$1A|1D]]]]

I started getting this strange error all of a sudden yesterday. Heroku confirmed making an <a href="https://devcenter.heroku.com/changelog" rel="nofollow">update</a> to the Ruby buildpack...

It has to do with the Rakefile. Does your Rakefile require any files? Does it require your app files? If so, then the app should not raise exceptions when it is loaded without any config vars set.

It's counter-intuitive because the app never runs without the config vars set.

In my case, the Sinatra app was looking for database urls in the init file:

<pre><code>uri = URI.parse( ENV[ "REDISTOGO_URL" ])
</code></pre>

This will raise an exception if there are no env vars set.

You may have the same issue with other database URL's, such as Mongo or Postgres.

So, protect against missing env vars:

<pre><code>if ENV[ "REDISTOGO_URL" ]
 uri = URI.parse( ENV[ "REDISTOGO_URL" ])
 ...
</code></pre>

You can check if it will work before pushing to Heroku by running <code>bundle exec rake -P</code>

Also, make sure all your tests pass after updating your init. Remove any cached init state by restarting Spork or similar.

Reference: <a href="https://devcenter.heroku.com/changelog-items/363" rel="nofollow">Show Rakefile errors in Ruby deploys</a>

blocks|key|4691474|text|您还可以尝试启用user-env-compile|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4691475|heroku+labs:enable+user-env-compile|code-block|syntax|javascript|4691476|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

you can also try enabling user-env-compile

<pre><code>heroku labs:enable user-env-compile
</code></pre>

blocks|key|185731|text|顺便说一句，我也遇到了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|185732|事实证明，当在production.rb中有一个rake任务引用config.assets.css_compressor+=+:sass时，我把它注释掉了。|offset|length|style|CODE|185733|非常简单的疏忽，但这会导致rake+assets:precompile失败，从而导致此错误。|185734|entityMap^0|0|7|D|W|10|0|D|M|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]|$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@$D|S|E|T|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|K|$]]

FWIW I just ran into this issue also. 

It turned out that I had <code>config.assets.css_compressor = :sass</code> commented out, when there was a rake task referring to it in <code>production.rb</code>.

Very simple oversight, but that would cause <code>rake assets:precompile</code> to fail and thus cause this error.

blocks|key|4691557|text|老问题，但我刚刚遇到了这个问题，现在有了一个新的解决方案。如果你使用的是Ruby版本<=+2.6.1和Bundler+2.0.1，请将Ruby2.6.3+($+rvm+install+"ruby-2.6.3")和Bundler更新到2.0.2+($+gem+install+bundler+'2.0.2')。确保在Gemfile中指定新的Ruby版本。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4691558|不幸的是，我不能告诉你为什么它有效，但到目前为止，它已经对我的团队中的其他3个人有效，所以值得一试。|4691559|entityMap^0|26|Q|3F|T|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

Old question, but I ran into this issue just now, and there is a new fix for it. If you're using Ruby version &lt;= 2.6.1, and Bundler 2.0.1, update Ruby to 2.6.3 (<code>$ rvm install "ruby-2.6.3"</code>) and Bundler to 2.0.2 (<code>$ gem install bundler '2.0.2'</code>). Make sure to specify the new Ruby version in your Gemfile.

Unfortunately I can't tell you why this works, but it's worked for 3 other people on my team so far, so it's worth a shot.

<pre><code> ensure you can run `$ bundle exec rake -P` against your app with no environment variables present
 and using the production group of your Gemfile.
 This may be intentional, if you expected rake tasks to be run
 cancel the build (CTRL+C) and fix the error then commit the fix:
 rake aborted!
</code></pre>

I don't have any rake tasks that I'd like to run automatically. Should I just ignore this warning?

Could not detect rake tasks

数据库

   ensure you can run `$ bundle exec rake -P` against your app with no environment variables present   and using the production group of your Gemfile.   This ma...

问无法检测rake任务
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问无法检测rake任务EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问无法检测rake任务
EN