运行克隆的红宝石项目时出错

Question

I have cloned a ruby on rails project from bitbucket and source tree. When I try to run the project, using rails server, I get following error

rails server
=> Booting WEBrick
=> Rails 3.0.10 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties- 3.0.10/lib/rails/application/configuration.rb:88:in `read': No such file or directory -      /Users/xyz/newderbywire/config/database.yml (Errno::ENOENT)
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/application/configuration.rb:88:in `database_configuration'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.0.10/lib/active_record/railtie.rb:58:in `block (2 levels) in <class:Railtie>'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/lazy_load_hooks.rb:26:in `on_load'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.0.10/lib/active_record/railtie.rb:57:in `block in <class:Railtie>'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/initializable.rb:25:in `instance_exec'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/initializable.rb:25:in `run'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/initializable.rb:50:in `block in run_initializers'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/initializable.rb:49:in `each'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/initializable.rb:49:in `run_initializers'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/application.rb:134:in `initialize!'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/application.rb:77:in `method_missing'
from /Users/xyz/newderbywire/config/environment.rb:5:in `<top (required)>'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/dependencies.rb:239:in `require'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/dependencies.rb:239:in `block in require'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/dependencies.rb:225:in `block in load_dependency'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/dependencies.rb:593:in `new_constants_in'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/dependencies.rb:225:in `load_dependency'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.10/lib/active_support/dependencies.rb:239:in `require'
from /Users/xyz/newderbywire/config.ru:3:in `block in <main>'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.2.5/lib/rack/builder.rb:46:in `instance_eval'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.2.5/lib/rack/builder.rb:46:in `initialize'
from /Users/xyz/newderbywire/config.ru:1:in `new'
from /Users/xyz/newderbywire/config.ru:1:in `<main>'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.2.5/lib/rack/builder.rb:35:in `eval'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.2.5/lib/rack/builder.rb:35:in `parse_file'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.2.5/lib/rack/server.rb:162:in `app'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.2.5/lib/rack/server.rb:253:in `wrapped_app'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.2.5/lib/rack/server.rb:204:in `start'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/commands/server.rb:65:in `start'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/commands.rb:30:in `block in <top (required)>'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/commands.rb:27:in `tap'
from /Users/xyz/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.10/lib/rails/commands.rb:27:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

Can anyone tell me what might be the issue?

Answer 1

Ruby on Rails applications, like most web applications, are usually backed by a database. You specify how to connect to the database in the <project directory>/config/database.yml file. Since this configuration is usually specific to a particular machine, many projects don't include the file in their public source trees.

In this case, you need to create the file and fill in the details yourself. See https://gist.github.com/961978 for example database.yml files for different database servers.