active_connection_name

# File activerecord/lib/active_record/connection_adapters/abstract/connection_specification.rb, line 54
      def active_connection_name #:nodoc:
        @active_connection_name ||=
           if active_connections[name] || @@defined_connections[name]
             name
           elsif self == ActiveRecord::Base
             nil
           else
             superclass.active_connection_name
           end
      end