Rails的生產+ Heroku的

Question

當我在控制檯輸入：

git push heroku master 

我得到：

 Your bundle is complete! It was installed into ./vendor/bundle 
     Cleaning up the bundler cache. 
     Would have removed sass-rails (3.2.6) 
     Would have removed sass (3.2.5) 
-----> Writing config/database.yml to read from DATABASE_URL 
-----> Preparing app for Rails asset pipeline 
     Running: rake assets:precompile 
     Asset precompilation completed (13.99s) 
-----> 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: 12.0MB 
-----> Launching... done, v7 
     http://chernobylmusic.herokuapp.com deployed to Heroku 

運行：

heroku run rake db:migrate 

結果是：

Running `rake db:migrate` attached to terminal... up, run.5186 
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/Rakefile:7) 
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/Rakefile:7) 

並且應用遷移。

當我訪問我的網頁在Heroku上，我看到We're sorry, but something went wrong.

Answer 1

運行heroku logs，並期待在錯誤

Answer 2

錯誤日誌說

PG::Error: ERROR: relation "events" does not exist 

這意味着你沒有DB創建，甚至你沒有你的遷移運行。檢查你的Gemfile中是否有pg gem。如果不在你的Gemfile的生產塊中添加gem 'pg'，因爲Heroku在postgres上運行。

THN做

git push heroku master 

THN

heroku run rake db:create 

THN

heroku run rake db:migrate 

它應該工作。