[英]Why is this error displaying 'Illegal arguments: undefined, string'?
我正在構建一個簡單的 node.js 應用程序。 我構建了我的后端 api 用於用戶注冊。 我正在嘗試使用 postman 對其進行測試,但出現此錯誤“非法 arguments:未定義,字符串”。 什么可以為此負責? 相關代碼如下
用戶模式
const mongoose = require('mongoose');
const Schema = mongoose.Schema
const UserSchema = new Schema({
userName: {
type: String,
required: true,
unique: true
},
firstName: {
type: String,
},
lastName: {
type: String,
},
email: {
type: String,
required: true,
unique: true
},
password: {
type: String,
required: true
},
dateOfRegistration: {
type: Date,
default: Date.now
},
dateOfBirth: {
type: Date,
},
userCategory: {
type: String,
default: 'workingClass'
}
})
module.exports = mongoose.model('users', UserSchema)
controller
const express = require('express');
const router = express.Router();
const bcrypt = require('bcryptjs');
const jwt = require('jsonwebtoken');
const config = require('config');
const auth = require('../middleware/auth')
const { check, validationResult } = require('express-validator');
const User = require('../models/User');
const UserModel = require('../models/User');
// @route POST api/users, Register a users; access Public
router.post('/', [
check('userName', 'Please add user name').not().isEmpty(),
check('email', 'Please include a valid email').isEmail(),
check('password', 'Please enter a password with six or more characters').isLength({ min: 5 })
],
async (req, res) => {
const errors = validationResult(req);
if(!errors.isEmpty()) {
return res.status(400).json({ errors: errors.array() });
}
const { userName, firstName, lastName, email, password, dateOfBirth, dateOfRegistration, userCategory } = req.body;
try {
let user = await User.findOne( { email });
if (user) {
return res.status(400).json({ msg: 'User already exist'})
}
user = new User({
userName,
firstName,
lastName,
email,
password,
dateOfBirth,
dateOfRegistration,
userCategory
});
const salt = await bcrypt.genSalt(10);
user.password = await bcrypt.hash(password, salt);
await user.save();
const payload = {
user: {
id: user.id
}
}
} catch (err) {
console.error(err.message);
res.status(500).send('Server Error')
}
}
);
module.exports = router;
服務器.js
const express = require('express');
const mongoose = require('mongoose');
const path = require('path');
// api require routes
const users = require('./routes/users');
// const auth = require('./routes/auth');
// const students = require('./routes/studentsSub');
// const workers = require('./routes/workersSub');
const app = express();
// database connection
const connectDB = async () => {
try {
await mongoose.connect('mongodb+srv://nawill:usha0816@cluster0.77u0d.mongodb.net/myFirstDatabase?retryWrites=true&w=majority',
{
useNewUrlParser: true,
useCreateIndex: true,
useUnifiedTopology: true,
useFindAndModify: false
});
console.log('MongoDB Connected ...')
} catch (err) {
console.error(err.message);
process.exit(1);
}
};
connectDB();
//Middleware
app.use(express.json({ extended: false }));
// app.get('/', (req, res) => res.json ({ msg: 'Hello node project'}));
//Routes
app.use('/api/users', users );
// app.use('/api/auth', auth );
// app.use('/api/students', students );
// app.use('/api/workers', workers );
//Start Server
app.listen(3000, ()=> console.log("Server started on 3000"))
問題已解決。 Postman 以“文本”格式而不是“JSON”格式發送請求,因此后端無法理解數據。 將我的 Postman 上的設置從“文本”更改為“JSON”時,一切正常。
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