Rails: error: database configuration does not specify adapter

Question

The Rails application I'm developing is running fine on my local machine (MAC). When I upload it to the server (Centos 6.2 Linux, with Rails 3.2.3 and Passenger installed), and try to start the application (by entering the URL into my browser), I get the following error message:

Ruby (Rack) application could not be started There appears to be a database problem.

Your application's database configuration file might be written incorrectly. Please check it and fix any errors.

The database server may not be running. Please check whether it's running, and start it if it isn't.

Error message: database configuration does not specify adapter (ActiveRecord::AdapterNotSpecified) Exception class: ActiveRecord::AdapterNotSpecified

Note that when I ran rake db:create and rake db:migrate, both of these tasks ran fine and the databases are created and migrated properly.

Following is my database.yml file:

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: acme_development
  pool: 5
  username: root
  password: ***********
  socket: /tmp/mysql.sock

test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: acme_test
  pool: 5
  username: root
  password: *****************
  socket: /tmp/mysql.sock

Any ideas?

Solution

Phusion Passenger defaults to the "production" environment, as documented. It looks like you assume "development". In that case, set "RackEnv development".