Javascript 无法在nodeJS中对用户进行身份验证：类型错误：无法使用'；在'；操作员搜索'；用户名'；在fs中

我有一个简单的表单来注册/验证用户。我能够成功注册用户，但无法进行身份验证。我试图研究这个问题，但没有发现任何有用的东西

以下是html登录表单：

<form method="post" action="/login">
   <input type="text" name="username" placeholder="username">
   <input type="password" name="password" placeholder="password">
   <input type="submit" name="submit" value="submit">


</form>

app.js：

var express = require('express');
var app = express();
var mongoose = require('mongoose');
var session = require('express-session');
var passport = require('passport');
var bodyParser = require('body-parser');
var User = require('./model/user.js');
var LocalStrategy = require('passport-local').Strategy;
var passportLocalMongoose = require('passport-local-mongoose');
var ejs = require('ejs');
var dbURL = 'mongodb://Admin:123@ds051655.mongolab.com:51655/yelpcamp';


mongoose.connect(dbURL, function(err) {
    err ? console.log(err) : console.log('successfully connected to db!');
});


app.set('view engine', 'ejs');
app.use(bodyParser.urlencoded({extended:true}));


app.use(session({
    secret:"sfsdfsdfsd",
    resave: false,
    saveUninitialized: false
}));

app.use(passport.initialize());
app.use(passport.session());

passport.use(new LocalStrategy(User, User.authenticate()));
passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());

app.post("/login", passport.authenticate("local", {

    successRedirect: "/secret",
    failureRedirect: "/login"


}), function(req,res) {
});

user.js：

var mongoose = require('mongoose');
var passportLocalMongoose = require('passport-local-mongoose');

var userSchema = new mongoose.Schema({
    username: String,
    password: String,
    email: String,
    pictures: [{type:mongoose.Schema.Types.ObjectId, ref: "Pictures"}],
    comments: [{type: mongoose.Schema.Types.ObjectId, ref: "Comments" }]  
});

userSchema.plugin(passportLocalMongoose);
var User = mongoose.model("User", userSchema);

module.exports = User;

package.json：

 "dependencies": {
    "body-parser": "^1.14.2",
    "connect-mongo": "^1.1.0",
    "ejs": "^2.4.1",
    "express": "^4.13.4",
    "express-session": "^1.13.0",
    "mongoose": "^4.3.7",
    "passport": "^0.3.2",
    "passport-local": "^1.0.0",
    "passport-local-mongoose": "^4.0.0"
  }

---

update1：为了解决这个问题，我尝试在User类中实例化User对象（mongoose.Schema已更改为new mongoose.Schema）。我还尝试将Strategy属性添加到

LocalPassport

。gnerkus指出了这些错误，但它们未能解决问题，因为我也遇到了同样的错误

发生错误是因为未实例化

用户

对象。这是因为模型无效。Mongoose模式应创建为

Mongoose.schema

构造函数的实例。您需要重构模型以使用

模式

实例：

// Create instance of 'Schema' constructor.
var userSchema = new mongoose.Schema({
    username: String,
    password: String,
    email: String,
    pictures: [{type:mongoose.Schema.Types.ObjectId, ref: "Pictures"}],
    comments: [{type: mongoose.Schema.Types.ObjectId, ref: "Comments" }]  
});

另外，

LocalStrategy

构造函数是从

passport local

的

Strategy

对象获得的。您需要替换此行：

var LocalStrategy = require('passport-local');

var LocalStrategy = require('passport-local').Strategy;

这一行：

var LocalStrategy = require('passport-local');

var LocalStrategy = require('passport-local').Strategy;

---

谢谢你的回复。我尝试了这段代码，但同样的问题仍然存在。我已经找到了解决方案。请看更新后的答案。我做了建议的更改（基本上是在mongoose.Schema之前添加新的），但它不起作用；同样的问题依然存在。但是，感谢您指出此错误（：