Multer：意外的领域答案

【问题标题】：Multer: Unexpected fieldMulter：意外的领域
【发布时间】：2021-09-23 01:38:39
【问题描述】：

我正在尝试为我的项目创建一个接受图像的 api，但由于某种原因它给出了以下错误

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    <pre>MulterError: Unexpected field<br> &nbsp; &nbsp;at wrappedFileFilter (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\multer\index.js:40:19)<br> &nbsp; &nbsp;at Busboy.&lt;anonymous&gt; (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\multer\lib\make-middleware.js:114:7)<br> &nbsp; &nbsp;at Busboy.emit (events.js:310:20)<br> &nbsp; &nbsp;at Busboy.emit (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\busboy\lib\main.js:38:33)<br> &nbsp; &nbsp;at PartStream.&lt;anonymous&gt; (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\busboy\lib\types\multipart.js:213:13)<br> &nbsp; &nbsp;at PartStream.emit (events.js:310:20)<br> &nbsp; &nbsp;at HeaderParser.&lt;anonymous&gt; (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\dicer\lib\Dicer.js:51:16)<br> &nbsp; &nbsp;at HeaderParser.emit (events.js:310:20)<br> &nbsp; &nbsp;at HeaderParser._finish (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\dicer\lib\HeaderParser.js:68:8)<br> &nbsp; &nbsp;at SBMH.&lt;anonymous&gt; (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\dicer\lib\HeaderParser.js:40:12)<br> &nbsp; &nbsp;at SBMH.emit (events.js:310:20)<br> &nbsp; &nbsp;at SBMH._sbmh_feed (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\streamsearch\lib\sbmh.js:95:16)<br> &nbsp; &nbsp;at SBMH.push (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\streamsearch\lib\sbmh.js:56:14)<br> &nbsp; &nbsp;at HeaderParser.push (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\dicer\lib\HeaderParser.js:46:19)<br> &nbsp; &nbsp;at Dicer._oninfo (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\dicer\lib\Dicer.js:197:25)<br> &nbsp; &nbsp;at SBMH.&lt;anonymous&gt; (C:\Users\Usuário\Desktop\dicionario\backend\node_modules\dicer\lib\Dicer.js:127:10)</pre>
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这是我的代码

const multer = require('multer')
const uploads = multer({dest: 'uploads/'})


router.post('/', uploads.single('ImagemSinal') ,async (req, res) => {
    console.log(req.file)
    try{
        const { title, description, tasks } = req.body

        const project =  await Project.create({title, description, user: req.userId });

       await Promise.all(tasks.map( async task => {
            const projectTask = new Task({...task, project: project._id})

           await projectTask.save()

           project.tasks.push(projectTask)
        }))

        await project.save()
        return res.send({ project })
    } catch(err) {
        console.log(err)
        return res.status(400).send({error: 'Error creating new project'})
        
       
    }
})

这就是我在邮递员中处理请求的方式

【问题讨论】：

标签： node.js mongodb multer

【解决方案1】：

当您从 Postman 发送图像时，您必须将 ImagemSinal 输入为 keyValue 作为图像，因为您在服务器端指定了。

您也可以在服务器端更改代码，而不是uploads.single('ImagemSinal')，您可以键入uploads.any()。

【讨论】：

它有点工作，但现在我必须解决出现的其他错误哈哈哈，
或者你可以输入 Postman ImagemSinal 作为keyValue。

【解决方案2】：

只需键入 file 作为键值，现在应该可以工作了。为我工作

【讨论】：