我正在尝试使用 Passenger、Apache 和 MySQL 在线设置我的应用程序，但是当我运行此命令时，我收到以下错误
rake db:migrate RAILS_ENV='production'
rake aborted!
database configuration does not specify adapter
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_specification.rb:47:in `resolve_hash_connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_specification.rb:41:in `resolve_string_connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_specification.rb:25:in `spec'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_specification.rb:130:in `establish_connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/railtie.rb:82:in `block (2 levels) in <class:Railtie>'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.9/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.9/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.9/lib/active_support/lazy_load_hooks.rb:43:in `block in run_load_hooks'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.9/lib/active_support/lazy_load_hooks.rb:42:in `each'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.9/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/base.rb:720:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/railties/databases.rake:25:in `block (2 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p327/bin/ruby_noexec_wrapper:14:in `eval'
/usr/local/rvm/gems/ruby-1.9.3-p327/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => db:migrate => db:load_config
(See full trace by running task with --trace)