ActiveRecord :: ConnectionNotEstablished（ActiveRecord :: ConnectionNotEstablished）

Question

我有一個適用於mongodb的Rails應用程序。我想將它部署到Heroku的，但得到的錯誤：

 Using sass-rails (3.2.5) 
     Installing sqlite3 (1.3.5) with native extensions Unfortunately, a fatal error has occurred. 
Please report this error to the Bundler issue tracker at https://github.com/carlhuda/bundler/issues 
so that we can fix it. Thanks! 
     /usr/local/lib/ruby/1.9.1/rubygems/installer.rb:483:in `rescue in block in build_extensions': 
ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError) 

嗯，我有評論sqlite的寶石在我的Gemfile：

# gem 'sqlite3' 

現在，它在Heroku上正確部署，但我得到錯誤，而我正在使用應用程序：

[2012-03-21 12:53:46] INFO WEBrick::HTTPServer#start: pid=9896 port=3000 
MONGODB [DEBUG] Logging level is currently :debug which could negatively impact client-side performance. You should set your logging level no lower than :info in production. 
MONGODB (140ms) admin['$cmd'].find({:ismaster=>1}).limit(-1) 
MONGODB (131ms) some['$cmd'].find({:getnonce=>1}).limit(-1) 
MONGODB (131ms) some['$cmd'].find({"authenticate"=>1, "user"=>"some", "nonce"=>"92a826e37bab5cd5", "key"=>"524d2de26fd6416b7cb0cddc2f496a2c"}).limit(-1) 
MONGODB (131ms) some['$cmd'].find({:getnonce=>1}).limit(-1) 
MONGODB (132ms) some['$cmd'].find({"authenticate"=>1, "user"=>"some", "nonce"=>"6a49c4f59de3294d", "key"=>"f081eb178e341e88d014c045b45ad633"}).limit(-1) 


Started GET "/docs" for 127.0.0.1 at 2012-03-21 12:53:53 +0400 

ActiveRecord::ConnectionNotEstablished (ActiveRecord::ConnectionNotEstablished): 
    activerecord (3.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in `retrieve_connection' 

我該如何解決我的問題？

更新

我已經包含在我的application.rb中下一行，所以它看起來像：

require 'rails/all' 

require "action_controller/railtie" 
require "action_mailer/railtie" 
require "active_resource/railtie" 
require "rails/test_unit/railtie" 

Answer 1

在你的config/application.rb中需要發表意見要求的ActiveRecord的：

# require "active_record/railtie" 

如果您需要require 'rails/all'的所有導軌，您需要將它拆分爲您想要的所有railtie。通過例如在我的應用程序中使用Mongoid而不是ActiveRecord的，而不是ActionResources我只有在的地方「軌道/所有」的：

# require 'rails/all' 
# require "active_record/railtie" 
require "action_controller/railtie" 
require "action_mailer/railtie" 
require "sprockets/railtie"