我收到一个错误：当我在浏览器中查看应用程序时，ActiveRecord :: ConnectionNotEstablished（完整跟踪） . 我似乎无法弄清楚如何解决这个问题 . 我尝试了下面提到的项目：
这里http://www.benjaminoakes.com/2011/09/15/activerecordconnectionnotestablished-in-rails-3-1-on-heroku/
以及stackoverflow.com/questions/7871233/ruby-activerecordconnectionnotestablished
在这里www.ruby-forum.com/topic/2854331
和其他多个人
（仅供参考，我在Windows 7上运行，Ruby 1.9.3，没有RVM）我的代码在这里可用：https://github.com/justjoehere/sample_app
任何帮助将不胜感激
我的Gemfile
source 'https://rubygems.org'
gem 'rails', '3.2.13'
group :development, :test do
gem 'sqlite3', '1.3.5'
gem 'rspec-rails', '2.9.0'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '3.2.4'
gem 'coffee-rails', '3.2.2'
gem 'uglifier', '1.2.3'
end
gem 'jquery-rails', '2.2.1'
group :test do
gem 'capybara', '1.1.2'
end
group :production do
gem 'pg', '0.12.2'
end
数据库yaml文件
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
development:
adapter: sqlite3
database: db/development.sqlite3
pool: 5
timeout: 5000
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
adapter: sqlite3
database: db/test.sqlite3
pool: 5
timeout: 5000
production:
adapter: sqlite3
database: db/production.sqlite3
pool: 5
timeout: 5000
跟踪：
activerecord（3.2.13）lib / active_record / connection_adapters / abstract / connection_pool.rb：410：在
retrieve_connection'activerecord（3.2.13）lib / active_record / connection_adapters / abstract / connection_specification.rb：171：在retrieve_connection'activerecord中（3.2.13）lib / active_record / connection_adapters / abstract / connection_specification.rb：145：在connection'activerecord（3.2.13）lib / active_record / query_cache.rb：67：在rescue in call'activerecord（3.2.13） ）lib / active_record / query_cache.rb：61：在call'activerecord（3.2.13）lib / active_record / connection_adapters / abstract / connection_pool.rb：479：在call'actionpack（3.2.13）lib / action_dispatch / middleware /callbacks.rb:28:inclock in call'activesupport（3.2.13）lib / active_support / callbacks.rb：405：inrun_133064122_call_765555415__callbacks'activesupport（3.2.13）lib / active_support / callbacks.rb:405:in__run_callback'activesupport（3.2.13）lib / active_support / callbacks.rb：385：in_run_call_callbacks'activesupport（3.2.13）lib / active_sup port / callbacks.rb：81：在run_callbacks'actionpack（3.2.13）lib / action_dispatch / middleware / callbacks.rb：27：在call'actionpack（3.2.13）lib / action_dispatch / middleware / reloader.rb： 65：在call'actionpack（3.2.13）lib / action_dispatch / middleware / remote_ip.rb：31：在call'actionpack（3.2.13）lib / action_dispatch / middleware / debug_exceptions.rb：16：在call'中actionpack（3.2.13）lib / action_dispatch / middleware / show_exceptions.rb：56：在call'railties（3.2.13）lib / rails / rack / logger.rb：32：在call_app'railties（3.2.13） lib / rails / rack / logger.rb:16：在block in call'activesupport（3.2.13）lib / active_support / tagged_logging.rb：22：intagged'railties（3.2.13）lib / rails / rack / logger.rb：16：在call'actionpack（3.2.13）lib / action_dispatch / middleware / request_id.rb：22：在call'rack（1.4.5）lib / rack / methodoverride.rb：21：in调用'rack（1.4.5）lib / rack / runtime.rb：17：在call'activesupport（3.2.13）lib / active_support / cache / strategy / local_cache.rb：72：在call'rack（1.4 . 5）lib / rack / lock.rb：15：在call'ac中tionpack（3.2.13）lib / action_dispatch / middleware / static.rb：63：在call'railties（3.2.13）lib / rails / engine.rb：479：在call'railties（3.2.13）lib / rails / application.rb：223：在call'rack（1.4.5）lib / rack / content_length.rb：14：在call'railties（3.2.13）lib / rails / rack / log_tailer.rb:17:在call'rack（1.4.5）lib / rack / handler / webrick.rb：59：inservice'C：/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:138 ：在service'C：/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:94：在run'C：/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1 /webrick/server.rb:191：在start_thread中的`block'