当表单设置为enctype ="multipart/form-data"时，我们如何在MySQL中发送数据?在node.js中? [英] How can we send data in MySQL when the form has set to enctype="multipart/form-data" in node.js?

问题描述

此 enctype =" multipart/form-data" 阻止我将数据发送到mysql，但这对于 multer 正常工作.我正在尝试将图像文件名存储到数据库，而文件将存储到我的项目目录./使用 multer 框架.我尝试了不同的查询，但没有任何反应.我希望你们遇到像我一样的问题，请花点时间.预先谢谢你.

This enctype="multipart/form-data" blocking me from sending my data to mysql but it is a must for multer to work. I'm trying to store the image filename to database while the file will store to my project directory ./uploads using multer framework. I've tried different queries but nothing happen. I'm hoping for you guys which have faced the same issue like mine please take a little of your time. Thank you in advance.

<form class="add-music-form" action="/save" method="POST" enctype="multipart/form-data">
    <div class="form-group">
        <div class="song-feaured-image">
            <input style="display: none;" type="file" accept="image/*" id="file" name="featured_img"  onchange="loadFile(event)" required>
            <img id="output" class="image-preview" width="130" src="/img/rock-on.jpg" />
            <label for="file" class="attach_file" style="cursor: pointer">
            <i class="material-icons">attach_file</i></label>
        </div>
    </div>

    <div class="form-group">
        <input type="text" class="form-control" placeholder="Title" id="title" name="title" required>
    </div>

    <div class="form-group">
        <input type="text" class="form-control" placeholder="Band name" id="band_name" name="band_name" required>
    </div>

    <div class="custom-file">
        <input type="file" class="custom-file-input" id="customFile" name="audio" required>
        <label class="custom-file-label" for="customFile">Select audio file</label>
    </div>
    <div class="mt-3">
        <button type="submit" class="btn btn-primary">Submit</button>
        <a onclick="cancel()" class="btn btn-default">Cancel</a>
    </div>
</form>

app.js

app.js

const path = require('path');
const express = require('express');
const multer = require('multer');
const ejs = require('ejs');
const bodyParser = require('body-parser');
const mysql = require('mysql');
const app = express();

const DIR = './assets/uploads/featured-img';

// Set The Storage Engine
let storage = multer.diskStorage({
    destination: function (req, file, callback) {
      callback(null, DIR);
    },
    filename: function (req, file, cb) {
      cb(null, file.fieldname + '-' + Date.now() + path.extname(file.originalname));
    }
});

let upload = multer({storage: storage});

// Set Database Connection
const connection=mysql.createConnection({
    host:'localhost',
    user:'root',
    password:'',
    database:'nodejs_crud'
});

connection.connect(function(error){
    if(!!error) console.log(error);
    else console.log('Database Connected!')
});

//set view file
app.use(express.static('assets'));
app.use(express.static(__dirname + '/assets'));

//set view engine
app.set('view engine', 'ejs');

app.use(bodyParser.json());
// app.use(express.urlencoded({ extended: true }));
app.use(bodyParser.urlencoded({ extend: false}));

app.get('/',(req, res) => {
    let sql = "SELECT * FROM music"
    let query = connection.query(sql, (err, rows) => {
        if(err) throw err;
        res.render('music_index');
    });
});

app.get('/', (req, res) => res.render('music_index'));


app.post('/save',upload.single('featured_img'), function (req, res) {
    let sql = "INSERT INTO `music`(`featured_img`, `title`, `band_name`, `audio`) VALUES ('" + req.body.featured_img + "', '"+req.body.title+"', '"+req.body.band_name+"', '"+req.body.audio+"')";
    let query = connection.query(sql, (err, results) => {
        if(err) throw err;
        res.redirect('/');
    });
});

// Server Listening
const port = 3000;

app.listen(port, () => console.log(`Server started on port ${port}`));

推荐答案

建议

参考此

您插入数据库的数据不在req.body对象上，而是在其他位置. 像req.files.file对象.您可以通过在app.js文件上使用 console.log('req.file'+ req.file +'req.files'+ req.files)来打印日志

your data that inserted into database isn't on req.body object instead some where else. like req.files.file object. you can print out the log by using console.log('req.file' + req.file + 'req.files' + req.files) on your app.js file

app.post('/save',upload.single('featured_img'), function (req, res) {

    console.log('req.file' + req.file + 'req.files' + req.files)

    let sql = "INSERT INTO `music`(`featured_img`, `title`, `band_name`, `audio`) VALUES ('" + req.body.featured_img + "', '"+req.body.title+"', '"+req.body.band_name+"', '"+req.body.audio+"')";
    let query = connection.query(sql, (err, results) => {
        if(err) throw err;
        res.redirect('/');
    });
});

参考

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