Multer: Can Multer work without being a middleware?

[jferrettiboke]

Hello guys!

Has multer a function to upload the file only based on the request? I mean being a simple function without being a middleware function using next.

I would like to know if there is something like that to achieve this: graphql/express-graphql#123.

Thanks!

[LinusU]

You can call the middleware function with just an empty object as res:

upload(req, {}, function (err) {
  if (err) throw err

  // req.file, req.files...
})

[jferrettiboke]

That does not work for me. What is the upload function for you? I have this: const upload = multer({ storage });, and the terminal throws an error saying "TypeError: upload is not a function".

[LinusU]

On which line does "TypeError: upload is not a function" happen? Can you post your code?

[chanon]

I wanted to know the same thing and tried what @LinusU recommended and got the same error.

I went back to look at the usage in the readme which shows:

app.post('/profile', upload.single('avatar'), function (req, res, next) {
  // req.file is the `avatar` file
  // req.body will hold the text fields, if there were any
})

app.post('/photos/upload', upload.array('photos', 12), function (req, res, next) {
  // req.files is array of `photos` files
  // req.body will contain the text fields, if there were any
})

So you actually need to call

upload.single('avatar')(req, {}, function (err) {
  if (err) throw err

  // req.file, req.files...
})

[jonchurch]

Closing as resolved 👍