：“无法设置未定义的属性'用户'”

Question

我在创建用户后尝试设置会话时收到错误：“无法设置未定义的属性'user'。”

 exports.signUp=function(req,res){  // singup
        new user({                  //user model
            username: req.body.username, // req body
             }).save(function(error,user){ //After a successful save of user
               **req.session.user=user.id;**  // here is the error after a successful save
            }
        });
    }

Answer 1

您是否在节点应用中使用过类似的中间件？

app.use(session({
secret: 'botnyuserdetails', // session secret
resave: true,
saveUninitialized: true
}));

Answer 2

exports.signUp=function(req,res){  // singup
        new user({                  //user model
            username: req.body.username, // req body
             }).save(function(error){ 
               //**req.session.user=user.id;**
               // save function doesn't return user
               // you can use this approach
               if(error){
                 res.json({error:"cannot save"})
               }
               else{
                 req.session.user = req.body.username;
               }
            }
        });
    }