multer访问req.body而不上传文件 [英] Multer access req.body without uploading files

问题描述

我有一个带有一些文本字段和文件输入的表格，不能为空，我想先对文本字段进行一些操作(添加到数据库中)，如果这些操作成功，则上传文件.这是我现在的代码:

I have a form with some text fields and file inputs which cannot be empty, I want to do some operations with the text fields first(adding to database) and if these operations were successful then upload the files. This is my code right now :

var multer = require('multer');
var getFields = multer();
router.post('/add',getFields.array(),function(req,res){
var artist = new ArtistModel({
            name : req.body.name.toLowerCase(),
            description:req.body.description,
          });

然后我将歌手添加到我的数据库，并在成功的回调中希望文件上传.但是问题是我不能简单地使用getFields.array()，因为我有文件输入，并且收到意外字段"错误，如果我不使用.array()，我将无法获得邮寄请求正文.无论如何，是否首先要获取带有enctype ="multipart/form-data"的表单文本字段，然后再上传文件?

I then add artist to my DB and in the successful callback I want the files to be uploaded. The problem is however I can't simply use getFields.array() because I have file inputs and I get "Unexpected fields" error, and if I dont use .array() I wont be able to get the post request body. Is there anyway to get the form text fields with enctype="multipart/form-data" first and then upload the files?

更新#2 多亏了 Dave ，我能够在不上传文件的情况下获得文本字段，因此我成功地将艺术家添加到数据库中，但是之后不知道如何上传文件， 我在addToDb的回调函数中创建了一个新变量:

Update #2 Thanks to Dave I was able to get the text fields without uploading files , I successfully added my artist to my database, however I couldn't figure out how to upload the files afterwards, I created a new variable in the callback function of my addToDb :

var storage = multer.diskStorage({
            destination: function (req, file, cb) {
              //cb(null, 'artistsMedia/drake/songs')
              var dir = 'artistsMedia/' + req.body.name.toLowerCase()+ '/images';
              mkdirp(dir,err => cb(err,dir))
            },
            filename: function (req, file, cb) {
              cb(null, req.body.name.toLowerCase() +'-'+ file.fieldname +'-'+ Date.now() + path.extname(file.originalname)) //Appending extension
            },

          });
          var upload = multer({
            storage: storage,
            limits :{fileSize :52428800}
          }).fields([{name:'Logo',maxCount:1},{name:'artistHome',maxCount:1},{name:'otherImgs',maxCount:10}]);

但是调用upload(req,res,err)似乎无效.

推荐答案

尝试使用multer的any()函数:

Try with multer's any() function:

var multer = require('multer');
var getFields = multer();
router.post('/add',getFields.any(),function(req,res){
  // any files, if sent, will be in req.files 
  var artist = new ArtistModel({
    name : req.body.name.toLowerCase(),
    description:req.body.description,
  });
});

如果确定没有文件提交，请使用multer的none()函数:

If you are sure there will be no files submitted, use multer's none() function:

var multer = require('multer');
var getFields = multer();
router.post('/add',getFields.none(),function(req,res){
  // uploading files will cause an error
  var artist = new ArtistModel({
    name : req.body.name.toLowerCase(),
    description:req.body.description,
  });
});

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