This initialization routine does nothing unless :active_record is one of the frameworks to load (Configuration#frameworks). If it is, this sets the database configuration from Configuration#database_configuration and then establishes the connection.

Source Code

# File initializer.rb, line 220
def initialize_database
  if configuration.frameworks.include?(:active_record)
    ActiveRecord::Base.configurations = configuration.database_configuration
    ActiveRecord::Base.establish_connection
  end
end