postman 中的表单数据发送空 object 到 node.js

Question

I know this has been asked multiple times, but I have been looking around and still can't find an answer to my problem.

index.js file

const express = require("express");
require("dotenv").config({
  path: ".env",
});
const PORT = process.env.PORT || 5000;
const runDatabase = require("./config/database");
const path = require('path')

const app = express()
const cors = require('cors')

app.use(cors())
app.use(express.json())
app.use(express.urlencoded({ extended: true }));

app.use("/uploads", express.static(path.join(__dirname, "uploads")));

// routers
const userRouter = require("./router/usersRouter");
const categoryRouter = require("./router/categoryRouter");
const productRouter = require("./router/productRouter");

app.use("/api", userRouter);
app.use("/api", categoryRouter);
app.use("/api", productRouter);

app.listen(PORT, () => {
  runDatabase();
  console.log(`🚀The Backend Server is up and running on port ${PORT}🚀`);
});

controller file

exports.createCategory = async (req, res) => {
  try {
    const { title, sort } = req.body;
    console.log(req.body); // print empty object

    await categoryModel.create({
      title,
      sort,
    });
    return res.status(200).send("created");
  } catch (err) {
    return res.status(400).send(err.message);
  }
};

Here is my code, when sending the request in JSON raw postman a response is what I need but when using a form-data it will return an empty body

this is happened when I send data with form-data returned an empty body

this is happened when I send data with raw (Json) returned what i need

Answer 1

If you use the option "x-www-form-urlencoded" I guess it will work. So here is the thing:

• When you are using postman's "form-data" it will be considered as multipart/form-data for which you need a library to parse form-data such as multer.

• For x-www-from-urlencoded raw data, you can parse the data using the express built-in middlewares or use a body-parser.