将Publify博客部署到Heroku会导致应用程序错误

Question

我正在尝试将普立菲博客的新安装部署到Heroku。在我的本地电脑上一切正常。

git push heroku master也没有提到任何有关问题的内容：

Counting objects: 7, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (4/4), done.
Writing objects: 100% (6/6), 786 bytes, done.
Total 6 (delta 1), reused 0 (delta 0)

-----> Heroku receiving push
-----> Ruby/Rails app detected
-----> Installing dependencies using Bundler version 1.2.2
       Running: bundle install --without development:test --path 
         vendor/bundle --binstubs bin/ --deployment

       Using rake (10.0.2)

       ... (edited out list of gems being used)

       Your bundle is complete! It was installed into ./vendor/bundle
       Cleaning up the bundler cache.
-----> Writing config/database.yml to read from DATABASE_URL
-----> Rails plugin injection
       Injecting rails_log_stdout
       Injecting rails3_serve_static_assets
-----> Discovering process types
       Procfile declares types      -> (none)
       Default types for Ruby/Rails -> console, rake, web, worker
-----> Compiled slug size: 10.7MB
-----> Launching... done, v7
       http://desolate-harbor-2909.herokuapp.com deployed to Heroku

To git@heroku.com:desolate-harbor-2909.git
   cea2c5c..efb4eb2  master -> master

但在那之后，我在应用程序页面上看到了这个：

应用程序错误 应用程序中发生错误，无法提供您的页面。请稍候再试。 如果您是应用程序所有者，请查看日志以获得详细信息。

Heroku日志显示了这一点：

heroku[slugc]: Slug compilation started
heroku[api]: Release v7 created by runsfor@gmail.com
heroku[api]: Deploy efb4eb2 by runsfor@gmail.com
heroku[web.1]: State changed from crashed to starting
heroku[slugc]: Slug compilation finished
heroku[web.1]: Starting process with command `bundle exec rails server -p 50812`
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/dsl.rb:7:in `evaluate'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/bin/bundle:14:in `<top (required)>'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/dsl.rb:32:in `instance_eval'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/friendly_errors.rb:4:in `with_friendly_errors'
app[web.1]: There was an error in your Gemfile, and Bundler cannot continue.
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/cli.rb:423:in `exec'
app[web.1]:        /app/Gemfile:7:in `eval_gemfile'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/dsl.rb:32:in `eval_gemfile'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/definition.rb:18:in `build'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler.rb:144:in `definition'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/vendor/thor/task.rb:27:in `run'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/vendor/thor/invocation.rb:120:in `invoke_task'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/vendor/thor.rb:275:in `dispatch'
app[web.1]:        /usr/local/lib/ruby/1.9.1/syck.rb:135:in `load'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/bin/bundle:23:in `load'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/vendor/thor/base.rb:408:in `start'
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/bin/bundle:14:in `block in <top (required)>'
app[web.1]: /usr/local/lib/ruby/1.9.1/syck.rb:135:in `load': syntax error on line 27, col 0: `adapter = uri.scheme' (ArgumentError)
app[web.1]:        /app/vendor/bundle/ruby/1.9.1/bin/bundle:23:in `<main>'
heroku[web.1]: Process exited with status 4
heroku[web.1]: State changed from starting to crashed
heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=desolate-harbor-2909.herokuapp.com fwd=171.5.16.142 dyno= queue= wait= connect= service= status=503 bytes=
heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/favicon.ico host=desolate-harbor-[2909.herokuapp.com][1] fwd=171.5.16.142 dyno= queue= wait= connect= service= status=503 bytes=

我做错什么了？我想我需要在部署到Heroku之前设置它。

Database.yml文件是：

login: &login
  adapter: postgresql
  host: localhost
  username: *****
  password: *****

development:
  database: typo_dev
  <<: *login

test:
  database: typo_tests
  <<: *login

production:
  database: typo
  <<: *login

Heroku运行rake db:迁移输出是：

Running `rake db:migrate` attached to terminal... up, run.7604
/usr/local/lib/ruby/1.9.1/syck.rb:135:in `load': syntax error on line 27, col 0: `adapter = uri.scheme' (ArgumentError)
       /usr/local/lib/ruby/1.9.1/syck.rb:135:in `load'
       /app/Gemfile:7:in `eval_gemfile'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/dsl.rb:32:in `instance_eval'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/dsl.rb:32:in `eval_gemfile'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/dsl.rb:7:in `evaluate'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/definition.rb:18:in `build'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler.rb:144:in `definition'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/cli.rb:423:in `exec'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/vendor/thor/task.rb:27:in `run'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/vendor/thor/invocation.rb:120:in `invoke_task'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/vendor/thor.rb:275:in `dispatch'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/vendor/thor/base.rb:408:in `start'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/bin/bundle:14:in `block in <top (required)>'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/lib/bundler/friendly_errors.rb:4:in `with_friendly_errors'
       /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.2/bin/bundle:14:in `<top (required)>'
       /app/vendor/bundle/ruby/1.9.1/bin/bundle:23:in `load'
       /app/vendor/bundle/ruby/1.9.1/bin/bundle:23:in `<main>'
There was an error in your Gemfile, and Bundler cannot continue.

Answer 1

当Rails加载database.yml文件时，它实际上是在将其加载为Yaml文件之前，先过滤ERB。。这样您就可以使用Ruby动态地创建您的配置，例如，将密码保留在存储库之外。

当您将Rails应用程序推送给Heroku时，文件被创建，替换原来的。这个新的database.yml使用ERB从DATABASE_URL环境变量构建配置，因此实际上它不是一个“纯”的Yaml文件--您可以将其视为类似于database.yml.erb的文件。

Typo 文件的Gemfile，然后是将其解析为Yaml，但是它不首先通过ERB提供。您所看到的错误是由读取文件的Yaml解析器导致的，但由于它是ERB而失败，因此无效的Yaml。

要修复它，您需要确保database.yml文件在被读取为Yaml之前已通过ERB。在您的Gemfile中更改行

conf = YAML.load(File.read(dbfile))

至

require 'erb'
conf = YAML.load(ERB.new(File.read(dbfile)).result)

您可能希望打开Typo的bug报告，甚至发送拉请求。