我是 Ruby 的新手,一直在关注“Ruby On Rails 3 教程 - 通过示例学习 Ruby - Michael Hartl 着”这本书。我目前在讨论静态页面的第 3 章。
在本章中,我在提示符中输入了以下命令:rails generate controller Pages home contact
一切正常。
然后这本书将我引导至 http://localhost:3000/pages/home
。当我将浏览器指向那里时,我收到以下错误。
ActiveRecord::ConnectionNotEstablished ActiveRecord::ConnectionNotEstablished Rails.root: /home/ralph/railsprojects/sample_app Application Trace | Framework Trace | Full Trace
The routes and controller erb don't appear to have any errors. Is this a database related error? Any ideas?
Thanks, DMAT
Update:
This is the code in my database.yml file.
# 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
这是来自 Framework Trace 的信息:
activerecord (3.1.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:409:in `retrieve_connection'
activerecord (3.1.1) lib/active_record/connection_adapters/abstract/connection_specification.rb:107:in `retrieve_connection'
activerecord (3.1.1)lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in `connection'
activerecord (3.1.1) lib/active_record/query_cache.rb:65:in `call'
activerecord (3.1.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:477:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/callbacks.rb:29:in `call'
activesupport (3.1.1) lib/active_support/callbacks.rb:392:in `_run_call_callbacks'
activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `send'
activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.1.1) lib/action_dispatch/middleware/callbacks.rb:28:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/reloader.rb:68:in `call'
rack (1.3.5) lib/rack/sendfile.rb:101:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/remote_ip.rb:48:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call'
railties (3.1.1) lib/rails/rack/logger.rb:13:in `call'
rack (1.3.5) lib/rack/methodoverride.rb:24:in `call'
rack (1.3.5) lib/rack/runtime.rb:17:in `call'
activesupport (3.1.1) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.3.5) lib/rack/lock.rb:15:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/static.rb:53:in `call'
railties (3.1.1) lib/rails/engine.rb:456:in `call'
railties (3.1.1) lib/rails/rack/content_length.rb:16:in `call'
railties (3.1.1) lib/rails/rack/log_tailer.rb:14:in `call'
rack (1.3.5) lib/rack/handler/webrick.rb:59:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `each'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
rack (1.3.5) lib/rack/handler/webrick.rb:13:in `run'
rack (1.3.5) lib/rack/server.rb:265:in `start'
railties (3.1.1) lib/rails/commands/server.rb:70:in `start'
railties (3.1.1) lib/rails/commands.rb:54
railties (3.1.1) lib/rails/commands.rb:49:in `tap'
railties (3.1.1) lib/rails/commands.rb:49
script/rails:6:in `require'
script/rails:6
最佳答案
我遇到了同样的问题,我从头开始使用示例应用程序并使用了这个 gemfile:
source 'http://rubygems.org'
gem 'rails', '3.1.1'
gem 'sqlite3'
group :development do
gem 'rspec-rails', '2.6.1'
end
group :test do
gem 'rspec-rails', '2.6.1'
gem 'webrat', '0.7.1'
end
group :assets do
gem 'sass-rails', '~> 3.1.4'
gem 'coffee-rails', '~> 3.1.1'
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
这解决了我的问题:)
关于ruby-on-rails - ruby - ActiveRecord::ConnectionNotEstablished,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7871233/