Ruby on rails 在检查中营救缺少的列'；：未初始化的常量ActiveRecord:：NodeDatabaseError（NameError）

我正在尝试通过cloud9.io运行。我不是程序员。尝试了我能理解的一切，但却走到了死胡同。我试图运行该应用程序，但它抛出了一个错误。以下是输出：

Digest::Digest is deprecated; use Digest
Auto-loading of `.env.development` will be removed in 1.0. See https://github.com/bkeepers/dotenv-deployment if you would like to continue using this feature.
=> Booting WEBrick
=> Rails 3.2.22 application starting in development on http://0.0.0.0:8080
=> Call with -d to detach
=> Ctrl-C to shutdown server
Connecting to database specified by database.yml
Exiting
/usr/local/rvm/gems/ruby-2.1.3/gems/doorkeeper-2.0.1/lib/doorkeeper/config.rb:29:in `rescue in check_for_missing_columns': uninitialized constant ActiveRecord::NoDatabaseError (NameError)
        from /usr/local/rvm/gems/ruby-2.1.3/gems/doorkeeper-2.0.1/lib/doorkeeper/config.rb:21:in `check_for_missing_columns'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/doorkeeper-2.0.1/lib/doorkeeper/config.rb:11:in `configure'
        from /home/ubuntu/workspace/config/initializers/doorkeeper.rb:6:in `<top (required)>'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/engine.rb:593:in `block (2 levels) in <class:Engine>'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/engine.rb:592:in `each'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/engine.rb:592:in `block in <class:Engine>'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/initializable.rb:30:in `instance_exec'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/initializable.rb:30:in `run'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/initializable.rb:55:in `block in run_initializers'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/initializable.rb:54:in `each'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/initializable.rb:54:in `run_initializers'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/application.rb:136:in `initialize!'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/railtie/configurable.rb:30:in `method_missing'
        from /home/ubuntu/workspace/config/environment.rb:5:in `<top (required)>'
        from /home/ubuntu/workspace/config.ru:17:in `block in <main>'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/rack-1.4.7/lib/rack/builder.rb:51:in `instance_eval'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/rack-1.4.7/lib/rack/builder.rb:51:in `initialize'
        from /home/ubuntu/workspace/config.ru:in `new'
        from /home/ubuntu/workspace/config.ru:in `<main>'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/rack-1.4.7/lib/rack/builder.rb:40:in `eval'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/rack-1.4.7/lib/rack/builder.rb:40:in `parse_file'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/rack-1.4.7/lib/rack/server.rb:200:in `app'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/commands/server.rb:46:in `app'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/rack-1.4.7/lib/rack/server.rb:304:in `wrapped_app'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/rack-1.4.7/lib/rack/server.rb:254:in `start'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/commands/server.rb:70:in `start'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/commands.rb:55:in `block in <top (required)>'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/commands.rb:50:in `tap'
        from /usr/local/rvm/gems/ruby-2.1.3/gems/railties-3.2.22/lib/rails/commands.rb:50:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'


Process exited with code: 1
[K

Process exited with code: 1

---

你知道如何修复它吗？

你运行了

rake db:setup

？您已经完成了中的所有步骤了吗？谢谢您的回复。不，我没法完成指令。Postgresql没有运行，所以我启动了它。现在输出是：我看到创建数据库的权限被拒绝。但是为什么呢？Cloud9手册说应该预先配置DB。应用程序是否应该使用yml中所述的DB？将其发布到中可能有助于获得更具体的Cloud9帮助可能重复：您是否运行了

rake DB:setup

？您已经完成了中的所有步骤了吗？谢谢您的回复。不，我没法完成指令。Postgresql没有运行，所以我启动了它。现在输出是：我看到创建数据库的权限被拒绝。但是为什么呢？Cloud9手册说应该预先配置DB。应用程序是否应该使用yml中规定的DB？发布此内容可能有助于获得更具体的Cloud9帮助（可能重复）：

development:
  adapter: postgresql
  encoding: utf8
  database: bikereg
  username: postgres
  password: !q2w3e4r5t
  pool: 5

test:
  adapter: postgresql
  database: bikereg_test

staging:
  adapter: postgresql
  database: bikereg_staging

production:
  adapter: postgresql
  database: bikereg_production
  pool: 25