TypeError: schema._preCompile is not a function MongoDb 问题

Question

当我尝试使用猫鼬方案时，出现以下错误，我找不到解决方案。

TypeError：schema._preCompile 不是函数

这就是模式的定义方式。

 const mongoose = require('mongoose') const {isEmail} = require('validator') const userSchema= new mongoose.Schema({ email: { type: String, require: true, validate: [isEmail, 'invalid email'], createIndexes: {unique: true}, trim:true }, nickName: { type: String, require:true, createIndexes: {unique:true}, trim:true }, password: { type: String, require:true, trim:true }, dateBorn: { type: Date }, games:[{ type: mongoose.Schema.Types, ref: 'Game' }], books:[{ type: mongoose.Schema.Types, ref: 'Book' }], movies:[{ type: mongoose.Schema.Types, ref: 'Movie' //referencia a things }], },{ timestamps:true, versionKey:false }) module.exports = mongoose.model('users',userSchema)

这就是我尝试导入的方式

 const usersSchema = require('../models/user')

这就是我定义连接的方式

 const mongoose = require('mongoose') const dbConnect = () => { const DB_URI= process.env.DB_URI const db = mongoose.connect(DB_URI,{ useNewUrlParser:true, useUnifiedTopology:true }, (err, res) => { if(!err){ console.log('CONECTION TO MONGODB SUCCESFULL') }else{ console.log('CONECTION TO MONGODB ERROR') } }) } module.exports = { dbConnect }

在此处输入链接描述

这是存储库链接以获取更多信息