set_session

# File activerecord/lib/active_record/session_store.rb, line 305
      def set_session(env, sid, session_data)
        Base.silence do
          record = get_session_model(env, sid)
          record.data = session_data
          return false unless record.save

          session_data = record.data
          if session_data && session_data.respond_to?(:each_value)
            session_data.each_value do |obj|
              obj.clear_association_cache if obj.respond_to?(:clear_association_cache)
            end
          end
        end

        sid
      end