Question

var express = require('express');
var router = express.Router(), 
multer = require('multer');

var uploading = multer({
  dest: __dirname + '../public/uploads/',
})

router.post('/upload', uploading, function(req, res) {
    console.log('uploaded');
})

我在这里的照片上传教程后出现错误Route.post() requires callback functions错误。也许这是由新版快递引起的？我记得上面是我们如何把中间放在一条路线上，但为什么在这里它不起作用？

Answer 1

基于multer docs，您似乎必须使用uploading.single()或uploading.array()作为中间件。此示例是从multer docs中的示例用法中获得的：

var upload = multer({ dest: 'uploads/' })

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 
})

Answer 2

def grandchild_coins(number_of_grand_children):
              # initalizes coins to 1
    Coins=1
    total_coins=[]

# for grand_child in the range entered this code is ran
for grand_child in range(number_of_grand_children):

    # if the grand_child number is not 0 coins = coins*2
    if grand_child !=0:
        Coins=Coins*2
        # prints coins for each grand_child
    print ' Grand_Child' + str(grand_child)  + str( Coins)
    total_coins.append(Coins)

        # returns total amount of coins



return sum(total_coins) + ' Coins in total'

Express 4使用multer作为中间件得到错误

2 个答案: