Javascript 为什么我总是得到TypeError：用户不是构造函数？

我正在练习创建模型和路线，并使用postman发送一个POST请求来测试它。然而，我一直认为用户不是一个构造函数错误

index.js路由

用户模式

我希望它会发回一个对象，其中包含我在邮递员上发送的以下信息：

{
    "name": "Michael",
    "email": "email@eail.com",
    "password": "ThisIsAPassword"
}

---

在编译模型之前，必须定义userSchema，如下所示：

const mongoose = require('mongoose')
const validator = require('validator')

const userSchema = new mongoose.Schema({ 
    name: {
        type: String,
        required: true, 
        trim: true
    }, 
    email: {
        type: String,
        require: true,
        trim: true, 
        lowercase: true,
        validate(value) {
            if(!validator.isEmail(value)) {
                throw new Error('Email is invalid')
            }
        }
    },
    age: {
        type: Number,
        default: 0,
        validate(value) {
            if(value < 0) {
                throw new Error('Age must be a positive number.')
            }
        }
    },
    password: {
        type: String,
        trim: true,
        lowercase: true,
        required: true,
        minlength: 7,
        validate(value) {
            if( value.toLowerCase().includes("password")) {
                throw new Error("Password can't be 'password'.")
            }
        }
    }
})

const User = mongoose.model('User', userSchema);
exports.User = User

---

现在它是一个构造函数，因为我们说每个User实例都是userSchema的一个新实例。

我弄明白了。在index.js文件的第三个部分，我遗漏了require

与此相反：

const User = ('./models/user')

应该是这样的：

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

谢谢大家的帮助

mongoose.model的第二个属性不是对象，而是mongoose.Schema

const mongoose = require('mongoose')
const validator = require('validator')

const userSchema = new mongoose.Schema({ 
    name: {
        type: String,
        required: true, 
        trim: true
    }, 
    email: {
        type: String,
        require: true,
        trim: true, 
        lowercase: true,
        validate(value) {
            if(!validator.isEmail(value)) {
                throw new Error('Email is invalid')
            }
        }
    },
    age: {
        type: Number,
        default: 0,
        validate(value) {
            if(value < 0) {
                throw new Error('Age must be a positive number.')
            }
        }
    },
    password: {
        type: String,
        trim: true,
        lowercase: true,
        required: true,
        minlength: 7,
        validate(value) {
            if( value.toLowerCase().includes("password")) {
                throw new Error("Password can't be 'password'.")
            }
        }
    }
})

const User = mongoose.model('User', userSchema);
exports.User = User

const User = ('./models/user')

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