类型错误：无法解构“req.body”的属性“userId”，因为它未定义

Question

每次我尝试在邮递员中向http://localhost:3000/api/orders/new发送请求时

我收到此错误：**TypeError: 无法解构 'req.body' 的属性 'userId'，因为它未定义。在 C:\Users\Web-Developer\Desktop\shoppy\backend\routes\orders.js:70:10 在 Layer.handle [as handle_request] (C:\Users\Web-Developer\Desktop\shoppy\backend\node_modules \express\lib\router\layer.js:95:5) 在下一个 (C:\Users\Web-Developer\Desktop\shoppy\backend\node_modules\express\lib\router\route.js:137:13) 在Route.dispatch (C:\Users\Web-Developer\Desktop\shoppy\backend\node_modules\express\lib\router\route.js:112:3) 在 Layer.handle [as handle_request] (C:\Users\Web -Developer\Desktop\shoppy\backend\node_modules\express\lib\router\layer.js:95:5) 在 C:\Users\Web-Developer\Desktop\shoppy\backend\node_modules\express\lib\router\index .js:281:22 在 Function.process_params (C:

const router = express.Router();
const {database} = require('../config/helpers');

/* GET ALL ORDERS */
router.get('/', (req, res) => {
    database.table('orders_details as od')
        .join([
            {
                table: 'orders as o',
                on: 'o.id = od.order_id'
            },
            {
                table: 'products as p',
                on: 'p.id = od.product_id'
            },
            {
                table: 'users as u',
                on: 'u.id = o.user_id'
            }
        ])
        .withFields(['o.id', 'p.title as name', 'p.description', 'p.price', 'u.username'])
        .sort({id: 1})
        .getAll()
        .then(orders => {
            if(orders.length > 0) {
                res.status(200).json(orders);
            } else {
                res.json({message: 'Mo Orders Found'})
            }
        }).catch(err => console.log(err));
})


/* GET SINGLE ORDER */
router.get('/:id', (req, res) => {

    const orderId = req.params.id;

    database.table('orders_details as od')
        .join([
            {
                table: 'orders as o',
                on: 'o.id = od.order_id'
            },
            {
                table: 'products as p',
                on: 'p.id = od.product_id'
            },
            {
                table: 'users as u',
                on: 'u.id = o.user_id'
            }
        ])
        .withFields(['o.id', 'p.title as name', 'p.description', 'p.price', 'u.username'])
        .filter({'o.id': orderId})
        .getAll()
        .then(orders => {
            if(orders.length > 0) {
                res.status(200).json(orders);
            } else {
                res.json({message: `No Orders Found with orderId ${orderId}`})
            }
        }).catch(err => console.log(err));
})

/* PLACE A NEW ORDER */
router.post('/new', (req, res) => {

    let {userId, products} = req.body;
    console.log(userId, products)
})

module.exports = router

Answer 1

这是解决方案......yayyy！

不需要安装 body-parser。

尝试这个：

app.use(express.json())

并在您的路线之前指定它，例如：

（顺序在这里真的很重要！）

app.use(express.json());
app.use('/api', Anyroute)

Answer 2

app.use(bodyParser.json()) // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true }))

我发现在指定路由路径之前需要使用此代码。

Answer 3

在我的server.ts我有

app.use('/admin', adminRoutes);
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }))

这给出了错误消息。更改为

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }))
app.use('/admin', adminRoutes);

让它发挥作用。正如OP在评论中所说，顺序必须首先是主体解析器，然后是路径路径。