部署到 Heroku 时 Postgres 端口出错答案

【问题标题】：Error with Postgres Port when deploying to Herokuy部署到 Heroku 时 Postgres 端口出错
【发布时间】：2016-04-11 22:10:38
【问题描述】：

我想部署到 Heroku，但出现错误：

预编译资产失败。

注意：我已将 config.assets.initialize_on_precompile = false 放入我的 application.rb 中，但它仍然无法正常工作。

`Preparing app for Rails asset pipeline
   Running: rake assets:precompile
   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_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql_adapter.rb:825:in `initialize'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql_adapter.rb:825:in `new'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql_adapter.rb:825:in `connect'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql_adapter.rb:542:in `initialize'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql_adapter.rb:41:in `new'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql_adapter.rb:41:in `postgresql_connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:440:in `new_connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:450:in `checkout_new_connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:421:in `acquire_connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:356:in `block in checkout'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:355:in `checkout'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:546:in `retrieve_connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_handling.rb:79:in `retrieve_connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_handling.rb:53:in `connection'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/model_schema.rb:203:in `table_exists?'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/rolify-3.4.0/lib/rolify/configure.rb:48:in `block in sanity_check'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/rolify-3.4.0/lib/rolify/configure.rb:46:in `each'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/rolify-3.4.0/lib/rolify/configure.rb:46:in `sanity_check'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/rolify-3.4.0/lib/rolify/configure.rb:7:in `configure'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/config/initializers/rolify.rb:1:in `<top (required)>'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `load'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `block in load'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `load'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:609:in `block (2 levels) in <class:Engine>'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:608:in `each'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:608:in `block in <class:Engine>'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:44:in `each'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:44:in `tsort_each_child'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/config/environment.rb:5:in `<top (required)>'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
   /tmp/build_9ff1fa36-2743-4f79-a9ac-62679367458b/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.0.1/lib/sprockets/rails/task.rb:54:in `block (2 levels) in define'
   Tasks: TOP => environment
   (See full trace by running task with --trace)

！！预编译资产失败。！试图访问一个不存在的数据库：！ https://devcenter.heroku.com/articles/pre-provision-database ！

！ Push 被拒绝，无法编译 Ruby 应用`

谢谢！

【问题讨论】：

问题：当你做出改变时：你做git commit -m并在你做git push heroku master之前推送到你的仓库吗？

标签： ruby-on-rails heroku deployment

【解决方案1】：

设置此代码后：config.assets.initialize_on_precompile = false

在推送到heroku之前不要忘记提交更改：

git commit -m

git push 到你的 github 远程仓库

然后git push heroku master

每当您对文件进行更改时，您需要先commit，然后再将push 发送到您的远程仓库，然后再推送到heroku。否则，heroku 不会选择更改。

更新：

Heroku 解决了同样的问题 here。遵循他们的解决方案

【讨论】：

感谢您的回复。推...让我们看看它是否有效
不工作...我推送到 Github 并重新部署...同样的错误。
您使用的是什么版本的 Rails？请参阅更新答案中的链接。
Rails 4.0...不知道发生了什么
你设置了你的database.yml吗？有postgress？

【解决方案2】：

感谢您的最后回答，我遇到了同样的问题，并且对我有用。我只是添加从通用 gem 中删除 sqlite3 并将其放入开发组中：

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

group :production do
 gem 'pg',              '0.17.1'
 gem 'rails_12factor','0.0.2'
end

当然，这成功了

heroku addons:add heroku-postgresql

【讨论】：

【解决方案3】：

试试这个：

1)首先打开你的Gemfile并删除gem 'sqlite3'，替换成这样：

group :production do
  gem 'pg',              '0.17.1'
  gem 'rails_12factor','0.0.2'
end

2)然后运行bundle install

3) 打开你的 config/application.rb 并修改如下：

production:
  adapter: postgresql
  encoding: unicode
  database: db/production.postgresql
  pool: 5
  username: test_postgre
  password:

记住 git commit 并推送它。

4) 然后运行heroku addons:add heroku-postgresql

5) 现在你可以运行git push heroku master

祝你好运！

【讨论】：