尽管模式“需要"，猫鼬仍保存空记录

本文介绍了尽管模式“需要"，猫鼬仍保存空记录的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在创建一个 Node.js 应用程序，它使用 Mongoose 和 Express 创建一个 RESTful API.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 不会阻止基于我的架构的保存?

I'm creating a Node.js app that uses Mongoose and Express to create a RESTful API. The Mongoose schema defines required fields; however, when I submit an empty POST via Postman, the API creates empty records. Why isn't Mongoose / MongoDB preventing a save based on my schema?

我只是在学习 node.js/express/mongoose/mongodb 并且来自 mySQL/MSSQL 世界，所以我可能会以错误的方式考虑模式所需的字段(即像数据库约束一样)

I'm just learning node.js / express / mongoose / mongodb and coming from a mySQL/MSSQL world so I may be thinking about schema required fields the wrong way (i.e. like a database constraint)

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:

When I post an empty body with Postman and query the result with the mongo console:

> 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阻止类似于 mySQL 或 MSSQL 中的数据库约束的保存吗?还是模式只是为 node.js 控制器提供数据以供参考，需要我创建业务逻辑来强制执行约束?

Isn't the schema supposed to validate the data and prevent the save similar to a database constraint in mySQL or MSSQL? Or does the schema just give data for a node.js controller to reference, requiring me to create business logic to enforce the constraint?

推荐答案

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

The schema property names are case sensitive, so change your Required fields to required:

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