Question

我拼命地试图将我的应用程序推送到heroku但它失败并显示此错误消息。它适用于我的本地机器，但我甚至无法将其推送到heroku。我一直试图让这项工作好几天，但是找不到。

could not connect to server: Connection refused
Is the server running on host "127.0.0.1" and accepting
TCP/IP connections on port 5432?

   Running: rake assets:precompile
   Running: rake assets:precompile
   Connecting to database specified by DATABASE_URL
   rake aborted!
   could not connect to server: Connection refused
   Is the server running on host "127.0.0.1" and accepting
   TCP/IP connections on port 5432?
   /tmp/build_6c1232cd-5bee-4760-a11c-1745627fba6e/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.14/lib/active_record/connection_adapters/postgresql_adapter.rb:1222:in `initialize'
   /tmp/build_6c1232cd-5bee-4760-a11c-1745627fba6e/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.14/lib/active_record/connection_adapters/postgresql_adapter.rb:1222:in `new'
   /tmp/build_6c1232cd-5bee-4760-a11c-1745627fba6e/vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.14/lib/active_record/connection_adapters/postgresql_adapter.rb:1222:in `connect'
   ....
   /tmp/build_6c1232cd-5bee-4760-a11c-1745627fba6e/vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.14/lib/sprockets/assets.rake:93:in `block (2 levels) in <top (required)>'
   /tmp/build_6c1232cd-5bee-4760-a11c-1745627fba6e/vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.14/lib/sprockets/assets.rake:60:in `block (3 levels) in <top (required)>'
   /tmp/build_6c1232cd-5bee-4760-a11c-1745627fba6e/vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.14/lib/sprockets/assets.rake:23:in `invoke_or_reboot_rake_task'
   /tmp/build_6c1232cd-5bee-4760-a11c-1745627fba6e/vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.14/lib/sprockets/assets.rake:29:in `block (2 levels) in <top (required)>'
   Tasks: TOP => environment
   (See full trace by running task with --trace)
 !
 !     Precompiling assets failed.
 !

 !     Push rejected, failed to compile Ruby app

这是我的宝石文件

来源'http://rubygems.org' ruby'2.0.0'

  gem 'rails', '3.2.14'
  gem 'json'
  gem 'thin'
  gem 'rails_12factor'
  gem 'paymill'
  gem 'pg', "0.16.0"
  gem 'haml'
  gem 'jammit', :git => 'https://github.com/documentcloud/jammit.git', :branch => 'master'
  gem 'sass-rails'
  gem 'uglifier'
  gem 'aws-s3'
  gem 'aws-sdk'
  gem 'friendly_id'
  gem 'devise', '~> 2.2.7'
  gem 'activeadmin', "0.6.0"
  gem 'formtastic'
  gem 'inherited_resources'
  gem 'paperclip', '~> 2.4'
  gem 'country_select'
  gem 'coffee-script'

  group :development, :test do
    gem 'escape_utils'
    gem 'rails-footnotes'
    gem 'rack-webconsole'
    gem 'better_errors'
    gem 'binding_of_caller'
    gem 'pry'
    gem 'pry-debugger'
  end

  group :test do
    gem 'factory_girl_rails', '~> 4.1.0'
    gem 'rspec-rails', '~> 2.14.0'
    gem 'cucumber-rails', '~> 1.4.0', require: false
    gem 'database_cleaner', '~> 1.0.1'
    # gem 'capybara', '~> 2.1.0'
    gem 'simplecov', require: false
  end

Answer 1

好的，我刚刚在我的应用中解决了这个问题。

诀窍在于故障排除文档https://devcenter.heroku.com/articles/rails-asset-pipeline#troubleshooting：

资产失败的最常见原因：预编译是一个依赖于启动其环境的应用程序。在slug编译期间，你的应用程序的配置变量在环境中不存在，所以你应该采取措施来处理初始化程序中配置变量（和附加资源）的nil情况。

在Rails 3.x中，您可以通过确保config / application.rb中包含以下行来阻止初始化应用程序并连接到数据库：

config.assets.initialize_on_precompile = false

更改此设置后不要忘记提交git。

在这一步中，有更多关于这个答案的解释：Error pushing to heroku - aborting my rake assets:precompile

Answer 2

你可以修改你的gemfile吗？

group :development, :test do
     gem 'sqlite3'
end

group :production do
     gem 'pg'
     gem 'rails_12factor'
end

所以基本上添加这三颗宝石。然后执行“捆绑安装”，然后将其推送到Heroku。希望这有效。

Answer 3

尝试以下

$ heroku labs:enable user-env-compile

其中一个gem可能导致的问题是在资产预编译期间尝试连接到数据库。检查Heroku Labs: user-env-compile的heroku文档，看看它是如何工作的。

Heroku：Postgres - 无法连接到服务器：连接被拒绝

3 个答案: