NodeJS Mongoose Passport 本地策略查询 Mongodb 报错，

Question

我有一个 Passport 本地策略尝试查询 mongodb 中的用户：

passport.use(new LocalStrategy(
    function(username, password, done){
      console.log("username and password is >>>>>", username, password);
      var findOne = Q.nbind(User.findOne, User);
      findOne({"username": username})
      .then(function(user){
        console.log("inside findone user>>>>>", err, user);

        if (!user) {
          return done( null, false, {messge: 'This user is not registered.'});
        }

        if (!user.comparePasswords(password)){
          return done(null, false, {message: 'This password is not correct'});
        }

        return done(null, user);
      })
      .fail(function(err){
        console.log("failed at here");
        return done(null, false, {message: "Server have difficulty"});
      })
    }
  ));

"failed at here" 被打印，这意味着访问 mongodb 时出错。但是，我在注册函数中编写了非常相似的函数，一切正常：

exports.signup = function(req, res, next){
  console.log("hit the signup function");
  var findOne = Q.nbind(User.findOne, User);
  findOne({username: req.body.username})
  .then(function(user){
    console.log("user from query is >>>>>", user);
    if (!user){
      // user doesn't exist, create a new one\
      var create = Q.nbind(User.create, User);
      var newUser = {username: req.body.username, password: req.body.password};
      return create(newUser);
    } else {
      // user already exist, redirect to sign in page
      res.send(409, 'already exist');
      //res.redirect('/signin');
    }
  })
  .then(function(user){
    res.json(200,user);
  })
  .fail(function(err){
    //next(err);
    console.log("error is >>>>", err);
    res.redirect('/signin');
  })
};

我已经通过注册创建了一个用户。所以当我尝试注册同一个用户时它会给我 409。但是，当我尝试使用该用户登录时，护照本地策略报告访问 mongodb 时出错。有什么想法吗？欢迎您查看回购协议：https://github.com/7seven7lst/chatterApp 护照配置可以在以下位置找到：https://github.com/7seven7lst/chatterApp/blob/master/lib/routes.js 并且可以在以下位置找到注册： https://github.com/7seven7lst/chatterApp/blob/master/lib/controllers/user.js

Answer 1

.then(function(user){
  console.log("inside findone user>>>>>", err, user);

抛出错误是因为 err 未定义。

如果记录 fail 函数的实际错误：

.fail(function(err){
  console.log("failed at here", err);
  return done(null, false, {message: "Server have difficulty"});
})

你会看到：

ReferenceError: err is not defined
    at /Users/dting/chatterApp/lib/routes.js:16:49

NodeJS Mongoose Passport 本地策略查询 Mongodb 报错，

NodeJS Mongoose Passport local strategy query Mongodb gives error,

mongoose

node.js

passport-local

passport.js