Question

这是我的控制器文件，我试图从中上传图像到mongoDB

const bodyParser=require('body-parser');
const mongoose = require('mongoose');
const Resource = mongoose.model('Resource');
const upload = require('express-fileupload');
const path=require('path');

app.use(upload())
app.post('/fileupload',function(req,res){
        var resource = new Resource();
        console.log(req.files);

        var file=req.files.file;
        var filename=file.name;
        resource.name=filename;

        file.mv('./resourceFiles/'+filename);
        var fpath='./resourceFiles/'+filename;
        resource.filePath=fpath;
        resource.save((err)=>{
            if(!err){
                console.log("file record")
                res.redirect('ownerHome');
            }
            else{
                console.log("error during insertion:"+ err);
            }
        });
    })

它抛出一个错误：

TypeError：无法读取null的属性“文件” 在/Users/Nikhil/Documents/node/auction/Controllers/owner.js:73:28 在Layer.handle [作为handle_request]（/Users/Nikhil/Documents/node/auction/node_modules/express/lib/router/layer.js:95:5）在下一个（/Users/Nikhil/Documents/node/auction/node_modules/express/lib/router/route.js:137:13）在Route.dispatch（/Users/Nikhil/Documents/node/auction/node_modules/express/lib/router/route.js:112:3）在Layer.handle [作为handle_request]（/Users/Nikhil/Documents/node/auction/node_modules/express/lib/router/layer.js:95:5）在/Users/Nikhil/Documents/node/auction/node_modules/express/lib/router/index.js:281:22 在Function.process_params（/Users/Nikhil/Documents/node/auction/node_modules/express/lib/router/index.js:335:12）在下一个（/Users/Nikhil/Documents/node/auction/node_modules/express/lib/router/index.js:275:10）在Busboy。（/Users/Nikhil/Documents/node/auction/node_modules/express-fileupload/lib/processMultipart.js:130:41）在Busboy.emit（events.js：323：22）在Busboy.emit（/Users/Nikhil/Documents/node/auction/node_modules/busboy/lib/main.js:37:33）在/Users/Nikhil/Documents/node/auction/node_modules/busboy/lib/types/multipart.js:304:17 在processTicksAndRejections（internal / process / task_queues.js：79：11）

以下是我的fileupload.ejs文件：

<form method="POST" enctype="multipart/form-data">
    <br>Select file:<input type="file" name="file">
    <br><input type="submit" value="Upload">
  </form>

Answer 1

不知道到底是什么问题，但是当我在server.js（入口文件）中使用相同代码而不是控制器时，代码可以无缝工作。

TypeError：无法读取null的属性“文件”

1 个答案: