尝试部署到 heroku 并切换 sqlite -> pg- 当我 rake:db 时出错

Question

所以，我正在尝试将在 SQLite3 上本地运行良好的应用程序更改为 Postgresql，以便我可以将其部署到 Heroku。 我查看了各种帖子和教程，并对我的 Gem 文件和 database.yml 文件进行了调整，但是当我尝试 rake:db migrate 时，我收到错误消息：“请安装 postgresql 适配器。”我知道大多数用户在他们的 gemfile 中不包含 gem 'pg' 时都会遇到这种情况，但我确实包含了它。

这是我收到的完整错误消息：http://dpaste.com/hold/972379/

你能帮忙吗？我真的看了几十个帖子，并尝试了每一个配置。

我的 procfile 如下所示：

web: bundle exec thin start -p $PORT

我的 database.yml 看起来像这样：

development:
  adapter: postgresql
  encoding: utf8
  database: project_development
  pool: 5
  username: 
  password:

test: &TEST
  adapter: postgresql
  encoding: utf8
  database: project_test
  pool: 5
  username: 
  password:

production:
  adapter: postgresql
  encoding: utf8
  database: project_production
  pool: 5
  username: 
  password:

我的 gemfile 看起来像这样：

source 'https://rubygems.org'

gem 'rails', '3.2.11'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'thin'
group :production do
gem 'pg'
end
group :development, :test do
gem 'sqlite3'
end

# Gems used only for assets and not required
# in production environments by default.

gem 'jquery-rails'

# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

# Use unicorn as the app server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger
# gem 'debugger'

注意：当我运行 bundle install 时，没有出现“使用 pg”，但我认为这是因为它不在生产环境中......仅供参考，以防它很重要

编辑： gem pg 在使用 heroku 生产时似乎运行良好。不知道发生了什么，因为一旦部署，它就不起作用了。这是我的 heroku 日志（我已经取出了我的电子邮件）：

2013-02-23T05:37:08+00:00 heroku[api]: Enable Logplex by XXXX@email.com
2013-02-23T05:37:08+00:00 heroku[api]: Release v2 created by XXXX@email.com
2013-02-23T05:37:18+00:00 heroku[slugc]: Slug compilation started
2013-02-23T05:38:28+00:00 heroku[api]: Scale to web=1 by XXXX@email.com
2013-02-23T05:38:28+00:00 heroku[api]: Attach HEROKU_POSTGRESQL_WHITE resource by XXXX@email.com
2013-02-23T05:38:28+00:00 heroku[api]: Release v3 created by XXXX@email.com
2013-02-23T05:38:29+00:00 heroku[api]: Add DATABASE_URL config by XXXX@email.com
2013-02-23T05:38:29+00:00 heroku[api]: Release v4 created by XXXX@email.com
2013-02-23T05:38:29+00:00 heroku[api]: Add  config by XXXX@email.com
2013-02-23T05:38:29+00:00 heroku[api]: Release v5 created by XXXX@email.com
2013-02-23T05:38:29+00:00 heroku[api]: Release v6 created by XXXX@email.com
2013-02-23T05:38:29+00:00 heroku[api]: Deploy cd00730 by XXXX@email.com
2013-02-23T05:38:30+00:00 heroku[slugc]: Slug compilation finished
2013-02-23T05:38:30+00:00 heroku[web.1]: Starting process with command `bundle exec thin start -p 55861`
2013-02-23T05:38:31+00:00 heroku[web.1]: Starting process with command `bundle exec thin start -p 55416`
2013-02-23T05:38:31+00:00 app[web.1]: bash: bundle: command not found
2013-02-23T05:38:32+00:00 heroku[web.1]: Process exited with status 127
2013-02-23T05:38:34+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5)
2013-02-23T05:38:34+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5)
2013-02-23T05:38:34+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5)
2013-02-23T05:38:37+00:00 app[web.1]: >> Using rack adapter
2013-02-23T05:38:37+00:00 app[web.1]: Connecting to database specified by DATABASE_URL
2013-02-23T05:38:37+00:00 app[web.1]: >> Maximum connections set to 1024
2013-02-23T05:38:37+00:00 app[web.1]: >> Thin web server (v1.5.0 codename Knife)
2013-02-23T05:38:37+00:00 app[web.1]: >> Listening on 0.0.0.0:55416, CTRL+C to stop
2013-02-23T05:38:38+00:00 heroku[web.1]: State changed from starting to up
2013-02-23T05:39:00+00:00 heroku[api]: Starting process with command `bundle exec rake db:migrate` by ray.lee@dartmouth.edu
2013-02-23T05:39:02+00:00 heroku[run.3422]: Awaiting client
2013-02-23T05:39:02+00:00 heroku[run.3422]: Starting process with command `bundle exec rake db:migrate`
2013-02-23T05:39:02+00:00 heroku[run.3422]: State changed from starting to up
2013-02-23T05:39:07+00:00 heroku[run.3422]: Client connection closed. Sending SIGHUP to all processes
2013-02-23T05:39:08+00:00 heroku[run.3422]: Process exited with status 0
2013-02-23T05:39:08+00:00 heroku[run.3422]: State changed from up to complete
2013-02-23T05:39:14+00:00 app[web.1]: Started GET "/" for 67.80.190.0 at 2013-02-23 05:39:14 +0000
2013-02-23T05:39:15+00:00 app[web.1]: Processing by LooksController#index as HTML
2013-02-23T05:39:15+00:00 app[web.1]:   Rendered looks/index.html.erb within layouts/application (7.7ms)
2013-02-23T05:39:16+00:00 heroku[router]: at=info method=GET path=/ host=quiet-everglades-5513.herokuapp.com fwd="67.80.190.0" dyno=web.1 queue=0 wait=1ms connect=2ms service=1385ms status=500 bytes=643
2013-02-23T05:39:16+00:00 heroku[router]: at=info method=GET path=/favicon.ico host=quiet-everglades-5513.herokuapp.com fwd="67.80.190.0" dyno=web.1 queue=0 wait=0ms connect=1ms service=7ms status=200 bytes=0
2013-02-23T05:39:16+00:00 app[web.1]: 
2013-02-23T05:39:16+00:00 app[web.1]:     5:   <%= stylesheet_link_tag    "application", :media => "all" %>
2013-02-23T05:39:16+00:00 app[web.1]:     8: </head>
2013-02-23T05:39:16+00:00 app[web.1]: Completed 500 Internal Server Error in 925ms
2013-02-23T05:39:16+00:00 app[web.1]:   app/controllers/looks_controller.rb:7:in `index'
2013-02-23T05:39:16+00:00 app[web.1]:     3: <head>
2013-02-23T05:39:16+00:00 app[web.1]: ActionView::Template::Error (no such file to load -- uglifier
2013-02-23T05:39:16+00:00 app[web.1]:   (in /app/app/assets/javascripts/application.js)):
2013-02-23T05:39:16+00:00 app[web.1]:   app/views/layouts/application.html.erb:6:in `_app_views_layouts_application_html_erb___1708027661978307033_32644180'
2013-02-23T05:39:16+00:00 app[web.1]: 
2013-02-23T05:39:16+00:00 app[web.1]:     6:   <%= javascript_include_tag "application" %>
2013-02-23T05:39:16+00:00 app[web.1]: 
2013-02-23T05:39:16+00:00 app[web.1]:     7:   <%= csrf_meta_tags %>
2013-02-23T05:39:16+00:00 app[web.1]:     9: <body>
2013-02-23T05:39:16+00:00 app[web.1]:     4:   <title>Scout</title>

Answer 1

您提供的日志文件提到另一个错误

ActionView::Template::Error (no such file to load -- uglifier
  (in /app/app/assets/javascripts/application.js)):
app/views/layouts/application.html.erb:6:in `_app_views_layouts_application_html_erb___1708027661978307033_32644180'

uglifier 是一个用于预编译资产和优化资产的 gem。 在我的应用中，默认情况下它位于 assets 组中，这意味着它在生产中不可用。

我对 Heroku 并不完全熟悉，但他们有一些关于 using the asset pipeline 的信息可能会有所帮助。您还应该确保您使用的是Heroku "Cedar" stack。

或者，如果您不使用资产管道，disable it

Answer 2

这是你需要做的：

1. 从此处https://developer.apple.com/downloads/index.action 下载适用于您的 mac os 版本的命令行工具

2. 安装您下载的命令行工具

3. 重启终端

4. 再次运行 bundle install（使用默认组中的 pg gem）。

这应该可以消除安装 pg 时遇到的错误。安装后再次运行rake db:migrate，它应该可以工作了。