为什么行未定义?

时间:2018-01-24 14:53:11

标签: javascript node.js express passport-local

使用Passport(本地注册)创建用户注册功能,代码如下:

// config/passport.js

// load all the things we need
var LocalStrategy   = require('passport-local').Strategy;

// load up the user model
var mysql = require('mysql');
var bcrypt = require('bcrypt-nodejs');
var dbconfig = require('./database');
var connection = mysql.createConnection(dbconfig.connection);

connection.query('USE ' + dbconfig.database);
// expose this function to our app using module.exports
module.exports = function(passport) {


    passport.serializeUser(function(user, done) {
        done(null, user.id);
    });

    // used to deserialize the user
    passport.deserializeUser(function(id, done) {
        connection.query("SELECT * FROM users WHERE id = ? ",[id], function(err, rows){
            done(err, rows[0]);
        });
    });


    passport.use(
        'local-signup',
        new LocalStrategy({
            // by default, local strategy uses username and password, we will override with email
            usernameField : 'username',
            passwordField : 'password',
            passReqToCallback : true // allows us to pass back the entire request to the callback
        },
        function(req, username, password, done) {
            // find a user whose email is the same as the forms email
            // we are checking to see if the user trying to login already exists
            connection.query("SELECT * FROM users WHERE username = ?",[username], function(err, rows) {
                if (err)
                    return done(err);
                if (rows.length) {
                    return done(null, false, req.flash('signupMessage', 'That username is already taken.'));
                } else {
                    // if there is no user with that username
                    // create the user
                    var newUserMysql = {
                        username: username,
                        password: bcrypt.hashSync(password, null, null)  // use the generateHash function in our user model
                    };

                    var insertQuery = "INSERT INTO users ( username, password ) values (?,?)";

                    connection.query(insertQuery,[newUserMysql.username, newUserMysql.password],function(err, rows) {
                        newUserMysql.id = rows.insertId;

                        return done(null, newUserMysql);
                    });
                }
            });
        })
    );

引发以下错误:

  

TypeError:无法读取属性' id'未定义的       在Query._callback(M:\ server \ config \ passport.js:70:55)       在Query.Sequence.end(M:\ server \ node_modules \ mysql \ lib \ protocol \ sequences \ Sequence.js:88:24)       在Query.ErrorPacket(M:\ server \ node_modules \ mysql \ lib \ protocol \ sequences \ Query.js:90:8)       在Protocol._parsePacket(M:\ server \ node_modules \ mysql \ lib \ protocol \ Protocol.js:279:23)       在Parser.write(M:\ server \ node_modules \ mysql \ lib \ protocol \ Parser.js:76:12)       在Protocol.write(M:\ server \ node_modules \ mysql \ lib \ protocol \ Protocol.js:39:16)       在Socket。 (M:\服务器\ node_modules \ MySQL的\ lib中\ Connection.js:103:28)       在emitOne(events.js:116:13)       在Socket.emit(events.js:211:7)       在addChunk(_stream_readable.js:263:12)       在readableAddChunk(_stream_readable.js:250:11)       在Socket.Readable.push(_stream_readable.js:208:10)       在TCP.onread(net.js:594:20)

使用console.log(rows);返回undefined。我该如何解决这个问题?

[编辑] 在回答被考虑后,产生了以下错误(因为rows.insertId 仍然未定义):

  

错误:无法将用户序列化为会话       传递(M:\ server \ node_modules \ passport \ lib \ authenticator.js:281:19)       在序列化(M:\ server \ node_modules \ passport \ lib \ authenticator.js:286:7)       在M:\ server \ config \ passport.js:24:9       在传递(M:\ server \ node_modules \ passport \ lib \ authenticator.js:294:9)       在Authenticator.serializeUser(M:\ server \ node_modules \ passport \ lib \ authenticator.js:299:5)       在SessionManager.logIn(M:\ server \ node_modules \ passport \ lib \ sessionmanager.js:14:8)       在IncomingMessage.req.login.req.logIn(M:\ server \ node_modules \ passport \ lib \ http \ request.js:50:33)       在Strategy.strategy.success(M:\ server \ node_modules \ passport \ lib \ middleware \ authenticate.js:248:13)       在验证时(M:\ server \ node_modules \ passport-local \ lib \ strategy.js:83:10)

2 个答案:

答案 0 :(得分:2)

根据我的理解,这与MySQL

无关

您共享的JSON没有id

  

var newUserMysql = {username:username,password:password};

然而,您正试图访问id,这就是您获得undefined

的原因
newUserMysql.id = rows.insertId;

要解决此问题,您需要将id添加到JSON。

var newUserMysql = {username: "username", password : "password", id:""};

答案 1 :(得分:0)

在整个时间里,答案都在我的鼻子底下。我所要做的就是改变这一点:

newUserMysql = rows.insertId;

进入这个:

newUserMysql = rows[0].insertId;

并且问题已成功解决。