"Cannot read property 'name' of undefined" POST JSON 失眠的方法

Question

我用于测试我的项目API Insomnia（像邮递员）程序，当我使用 GET 方法时一切顺利，但是 POST 方法 return 未定义 req.body.name 和 req.body.price, 这个 error 我抓住了，这是我的要求 query

这是我的app.js

const express = require('express');
const app = express();
const morgan = require('morgan');
const mongoose = require('mongoose');
require('dotenv').config()


mongoose.connect(`mongodb+srv://vadim:${process.env.MONGO_ATLAS_PS}@cluster0-abuqs.mongodb.net/shop`, {
  useNewUrlParser: true,
  useUnifiedTopology: true
});

const productRoutes = require('./api/routes/

app.use(morgan('dev'));

app.use('/products', productRoutes);

module.exports = app;

这是我的 products.js

路由器

const express = require('express');
const router = express.Router();
const mongoose = require('mongoose');
const Product = require('../models/product')

router.post("/", (req, res, next) => {
    console.log(JSON.stringify(req.body))
    const product = new Product({
        _id: new mongoose.Types.ObjectId(),
        name: req.body.name,
        price: req.body.price
    });
    product
        .save()
        .then(result => {
            console.log(result);
            res.status(201).json({
                message: "Handling POST requests to /products",
                createdProduct: result
            });
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({
                error: err
            });
        });
});

和product.js的模型

const mongoose = require('mongoose');

const productSchema = mongoose.Schema({
    _id: mongoose.Schema.Types.ObjectId,
    name: String,
    price: Number
});

module.exports = mongoose.model('Product', productSchema);

Answer 1

您需要使用 body-parser 来使用 express POST 方法捕获数据。

首先，您需要安装它：

npm install body-parser --save

然后在你的代码中：

const express = require('express');
const router = express.Router();
const mongoose = require('mongoose');
const Product = require('../models/product');
const bodyParser = require('body-parser');

express.use(bodyParser.json());

express.post("/", (req, res, next) => {
    console.log(JSON.stringify(req.body))
    const product = new Product({
        _id: new mongoose.Types.ObjectId(),
        name: req.body.name,
        price: req.body.price
    });
    //The rest of your code
});

有关它的更多信息，read the package docs。

"Cannot read property 'name' of undefined" POST JSON 失眠的方法

"Cannot read property 'name' of undefined" POST JSON method in Insomnia

node.js

json

post

insomnia