Question

我试图在使用Multer上传文件之前验证我收到的idProject是否为ObjectId或它是否存在于我的数据库中。但是它将保存文件，然后进行验证。

我已经尝试放入app.post（'/ file'，（）=>）之类的索引，它可以工作，但我想将其保留在.controller.js和.route.js中

index.js

const storage = multer.diskStorage({
    destination: path.resolve('./uploads'),
    filename: (req, file, cb, filename) => {
        cb(null, uuid() + path.extname(file.originalname));
    }
});
app.use(multer({storage: storage}).single('file'));

project.controller.js

projectCtrl.addFileToProject = async (req, res) => {
    const { id } = req.params;
    await Project.findById(id)
        .then((project) => {
            if(project === null){
                res.json({
                    status: 'Fail to Add File 1'
                });
            }
            else{
                fileCtrl.uploadFile(req, async (cb) => {
                    await Project.findByIdAndUpdate(id, {$addToSet: {files: cb}})
                });
                res.json({
                    status: 'File Added to Project'
                });
            }
        })
        .catch(() => {
            res.json({
                status: 'Fail to Add File 2'
            });
        });
};

file.controller.js

fileCtrl.uploadFile = async (data, cb) => {
var now = moment();
const { size } = data.file;
const { mimetype } = data.file;
var icon;
if (mimetype === mime.lookup('.pdf')) {
    icon = 'pdfIcon';
}
else if (mimetype === mime.lookup('.doc')) {
    icon = 'docIcon';
}
else if (mimetype === mime.lookup('.docx')) {
    icon = 'docIcon';
}
else if (mimetype === mime.lookup('.xls')) {
    icon = 'xlsIcon';
}
else if (mimetype === mime.lookup('.xlsx')) {
    icon = 'xlsIcon';
}
else if (mimetype === mime.lookup('.ppt')) {
    icon = 'pptIcon';
}
else if (mimetype === mime.lookup('.pptx')) {
    icon = 'pptIcon';
}
else if (mimetype === mime.lookup('.jpg')) {
    icon = 'jpgIcon';
}
else if (mimetype === mime.lookup('.png')) {
    icon = 'pngIcon';
}
else if (mimetype === mime.lookup('.txt')) {
    icon = 'txtIcon';
}
else if (mimetype === mime.lookup('.zip')) {
    icon = 'zipIcon';
}
else {
    icon = 'fileIcon';
}
var decimals=2;
if(size == 0) return '0 Bytes';
var k = 1024,
dm = decimals <= 0 ? 0 : decimals || 2,
sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
i = Math.floor(Math.log(size) / Math.log(k));
var fileSize = parseFloat((size / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
const file = new File();
file.filename = data.file.filename;
file.author = data.body.author;
file.path = '/uploads/' + data.file.filename;
file.originalname = data.file.originalname;
file.icon = icon;
file.size = fileSize;
file.created_at = now;
await file.save();
cb(file._id);
};

Answer 1

使用multer，您无法真正控制动态上传。但是，您可以将其上传到temp文件夹中，然后检查ID是否存在。如果数据库中存在该文件，则可以将该文件移到另一个文件夹，否则，请删除该文件

上传前先在Multer中验证

1 个答案: