当我上传图像时使用 multer 它会显示一条消息，表明图像已成功添加但未添加到上传文件夹

Question

Here's my code to upload and save image in database , when I do this on postman it gives an error of 'undefined' but 'file uploaded successfully' and neither did my image/file is stored in upload folder

//多文件

const multer = require('multer');

const storage = multer.diskStorage({
    destination: (req, file, cb) => {
        cb(null, 'originalname');
    },
    filename: (req, file, cb) => {
        cb(null, new Date().toISOString().replace(/:/g, '-') + '-' + file.originalname);
    }
});
const filefilter = (req, file, cb) => {
    if (file.mimetype === 'image/png' || file.mimetype === 'image/jpg' 
        || file.mimetype === 'image/jpeg'){
            cb(null, true);
        }else {
            cb(null, false);
        }
}

const upload = multer({storage: storage, fileFilter: filefilter});

module.exports = {upload}

//图像数据模型

const mongoose=require('mongoose');


const imageSchema=new  mongoose.Schema({

    fileName: {
        type: String,
        required: true
    },
    filePath: {
        type: String,
        required: true
    },
    fileType: {
        type: String,
        required: true
    },
    fileSize: {
        type: String,
        required: true
    }

}, {timestamps: true});

module.exports=mongoose.model('imagedata', imageSchema);

//post控制器

exports.uploadimage = async (req, res, next) => {
    try{

        const file= req.file;
        console.log(file);
        res.status(201).json({messsage:"file uploaded successfully"})

    }catch(error){

        res.status(400).send(error.message)
    }

Answer 1

你没有指定你想要保存文件的目的地在您的项目中创建一个名为 uploads 的文件夹，并按照我在下面提到的进行更改：

destination: (req, file, cb) => {
        cb(null, 'uploads/originalname');
   },

当我上传图像时使用 multer 它会显示一条消息，表明图像已成功添加但未添加到上传文件夹

Using multer when I upload an image it shows me a message that image has been successfully added but does not added to upload folder

mongodb

node.js

multer