Heroku在我的Rails應用程序中不會識別'pg'寶石Gemfile

Question

我仍然是Ruby on Rails的相對新手，而且我是Heroku的完全新手。

我已經在開發和生產環境中設置了我的Rails應用程序，以使用postgres而不是sqlite3，並且已將「gem'pg'」放入我的Gemfile中。而在本地，我的應用程序工作得很好。

使它在Heroku上工作是一個不同的故事。在我將應用程序推送到Heroku後，當我輸入「heroku run rake db：migrate」時，它告訴我：「rake aborted！爲數據庫適配器指定了'postgresql'，但該gem未加載。的Gemfile「。

是的，gem 'pg'是在我的Gemfile中，但我仍然收到此錯誤。

什麼給？

這裏是我的Gemfile看起來像現在：

source 'https://rubygems.org' 
ruby '2.0.0' 
gem 'rails',  '4.0.1' 
gem 'pg' 

group :assets do 
end 

gem 'bcrypt-ruby', '~> 3.1.2' 
gem 'haml' 
gem 'devise', '3.0.0.rc' 
gem 'protected_attributes' 
gem 'sass-rails', '4.0.1' 
gem 'uglifier', '2.1.1' 
gem 'coffee-rails', '4.0.1' 
gem 'jquery-rails', '3.0.4' 
gem 'turbolinks', '1.1.1' 
gem 'jbuilder', '1.0.2' 
gem 'knockout-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' 

group :doc do 
    gem 'sdoc', '0.3.20', require: false 
end 

group :production do 
    gem 'unicorn' 
    gem 'rails_12factor', '0.0.2' 
end 

這裏就是我的database.yml是這樣的：

development: 
    adapter: postgresql 
    encoding: unicode 
    database: financemeter 
    pool: 5 
    password: 

test: 
    adapter: postgresql 
    encoding: unicode 
    database: financemeter 
    pool: 5 
    timeout: 5000 

production: 
    adapter: postgresql 
    database: dbe67fgdnnqg88 
    pool: 5 
    timeout: 5000 
    user: njatxlpjjrzfoe 
    password: HULxOtPALAk4FnzZe-_737TvPc 

這裏是完整的錯誤日誌，當我嘗試遷移在Heroku 。 （同樣，在當地我很好。我在本地在MacBook上，如果該事項的工作。）

/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.1/lib/active_record/connection_adapters/connection_specification.rb:58:in `rescue in resolve_hash_connection' 
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.1/lib/active_record/connection_adapters/connection_specification.rb:55:in `resolve_hash_connection' 
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.1/lib/active_record/connection_adapters/connection_specification.rb:46:in `resolve_string_connection' 
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.1/lib/active_record/connection_adapters/connection_specification.rb:32:in `spec' 
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.1/lib/active_record/connection_handling.rb:39:in `establish_connection' 
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.1/lib/active_record/railtie.rb:176:in `block (2 levels) in <class:Railtie>' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/lazy_load_hooks.rb:27:in `each' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/lazy_load_hooks.rb:27:in `on_load' 
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.1/lib/active_record/railtie.rb:174:in `block in <class:Railtie>' 
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/initializable.rb:30:in `instance_exec' 
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/initializable.rb:30:in `run' 
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/initializable.rb:55:in `block in run_initializers' 
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/initializable.rb:54:in `run_initializers' 
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/application.rb:215:in `initialize!' 
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/railtie/configurable.rb:30:in `method_missing' 
/app/config/environment.rb:5:in `<top (required)>' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/dependencies.rb:229:in `require' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/dependencies.rb:229:in `block in require' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/dependencies.rb:214:in `load_dependency' 
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.1/lib/active_support/dependencies.rb:229:in `require' 
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/application.rb:189:in `require_environment!' 
/app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.1/lib/rails/application.rb:250:in `block in run_tasks_blocks' 

Answer 1

你有沒有在機器上安裝PostgreSQL的？
如果沒有，請使用自制軟件安裝頁面。
安裝完成後，請確保初始化pg數據存儲。

另外，根據您的PG是如何安裝的，你可能需要指定你的database.yml文件

username: someuser_on_pg 
    host: localhost 

希望幫助