session设置不成功？

if(results[0].password === userObj.password){
      results[0].teams.forEach(function(obj, i, arr){
        if(obj.tag == true){
          team.find({teamId: obj.teamId}, function (err, teams) {
            console.log('hha',teams);
            res.session.team = {
              teamId: teams[0].name,
              teamId: teams[0].teamId
            }
          })
        }
      });
      req.session.user = {
        userId: results[0].userId,
        phone: results[0].phone
      };
      res.redirect('/liao');
    }else{
      req.flash('error','密码不正确');
      res.redirect('/login');
      return console.error('error password')
    }

只有req.session.user可以设置成功。而req.session.team失败