class Rails::Generators::AppGenerator

def initialize(*args)
  raise Error, "Options should be given after the application name. For details run: rails --help" if args[0].blank?
  @original_wd = Dir.pwd
  super
  if !options[:skip_active_record] && !DATABASES.include?(options[:database])
    raise Error, "Invalid value for --database option. Supported for preconfiguration are: #{DATABASES.join(", ")}."
  end
end