尽管架构“需要”，猫鼬仍保存空记录

Question

我正在创建一个使用 Mongoose 和 Express 来创建 RESTful API 的 Node.js 应用程序。 Mongoose 模式定义了必填字段；但是，当我通过 Postman 提交空 POST 时，API 会创建空记录。为什么 Mongoose / MongoDB 不阻止基于我的模式的保存？

我刚刚学习 node.js / express / mongoose / mongodb 并且来自 mySQL/MSSQL 世界，所以我可能会错误地考虑架构所需字段（即像数据库约束一样）

这是我的路由器：

// Initialize controller(s) for CRUD
var customer = require('../controllers/customercontroller');

// Initialize Router
var express = require('express');
var router = express.Router();

router.get('/:id', function (req, res) {
    console.log("Customer Requested");

    customer.read(req, res);
});

router.get('/', function (req, res) {
    console.log("Customer List Requested");
    customer.getList(req, res);
});

router.put("/:id", function (req, res) {
    console.log("Updating Customer");
    customer.update(req, res);

});

router.post("/", function (req, res) {
    console.log("Creating Customer");
    customer.create(req, res);

});

router.delete("/:id", function (req, res) {
    console.log("Delete Customer");
    customer.delete(req, res);
});

module.exports = router;

这是我的控制器：

var Customer = require('../models/customermodel');

exports.getList = function (req, res) {
    Customer.find({}, function (err, customer) {
        if (err)
            res.send(err);
        res.json(customer);
    });
};

exports.create = function (req, res) {
    var customer = new Customer(req.body);
    customer.save(function (err, customer) {
        if (err)
            res.send(err);
        res.json(customer);
    });
};

exports.read = function (req, res) {
    Customer.find(req.params.id, function (err, customer) {
        if (err)
            res.send(err);
        res.json(customer);
    });
};

exports.update = function (req, res) {
    Customer.findOneAndUpdate(req.params.id, function (err, customer) {
        if (err)
            res.send(err);
        res.json(customer);
    });
};

exports.delete = function (req, res) {
    Customer.remove({_id: req.params.id}, function (err, customer) {
        if (err)
            res.send(err);
        res.json({ message: 'Customer deleted'});
    });
};

这是我的模型：

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/hs_db');

var Schema = mongoose.Schema;

var CustomerSchema = new Schema({
    "name": { type: String, Required: 'Required: name' },
    "alias": { type: String, Required: 'Required: alias' },
    "email": { type: String, Required: 'Required: email' },
    "address1": { type: String, Required: 'Required: address1' },
    "address2": { type: String, Required: 'Required: address2' },
    "address3": { type: String, Required: 'Required: address3' },
    "city": { type: String, Required: 'Required: city' },
    "state": { type: String, Required: 'Required: state' },
    "postcode": { type: String, Required: 'Required: postcode' },
    "country": { type: String, Required: 'Required: country' },
    "created": { type: Date, Required: 'Required: date' },
});

module.exports = mongoose.model('customer', CustomerSchema);

当我使用 Postman 发布一个空正文并使用 mongo 控制台查询结果时：

> db.customers.find()
{ "_id" : ObjectId("591f25ae0cca8f5148cce551"), "__v" : 0 }
{ "_id" : ObjectId("591f25d40cca8f5148cce552"), "__v" : 0 }
{ "_id" : ObjectId("591f25f00cca8f5148cce553"), "__v" : 0 }
{ "_id" : ObjectId("591f2764dc5a191fe8730ccd"), "__v" : 0 }
>

所以，我的问题：

模式不是应该验证数据并防止保存类似于 mySQL 或 MSSQL 中的数据库约束吗？还是架构只是为 node.js 控制器提供数据来引用，需要我创建业务逻辑来强制执行约束？

Answer 1

架构属性名称区分大小写，因此请将您的 Required 字段更改为 required：

var CustomerSchema = new Schema({
    "name": { type: String, required: 'Required: name' },
    "alias": { type: String, required: 'Required: alias' },
    ...

Answer 2

您可以通过简单的方式定义必填字段，如下所示：

var CustomerSchema = new Schema({
    "name": { type: String, required: true },
    "alias": { type: String, required: true },
    ...