我正在嘗試制作一個需要上傳和存盤影像的應用程式，我正在使用 Express、Mongoose 和 Multer 并嘗試上傳到 MongoDB。
目前，當我嘗試上傳影像時，Multer 確實創建了一個檔案夾并將影像存盤在該檔案夾中，但它不會將專案保存到資料庫中并且它會導致服務器崩潰并給出錯誤：ObjectParameterError: Parameter "obj" to Document() must be an object, got itemImages\034ed9d34a3b034becdb415d67b7d193。
添加到資料庫可以正常作業，而無需嘗試使用 multer 添加影像。
我的代碼：
item_controller.js：
const Item = require('../models/item_schema');
const addItem = (req, res) => {
let itemData = req.body
let itemImage = req.file.path
Item.create(itemData, itemImage)
.then((data) => {
if (data) {
res.status(201).json(data)
}
})
}
module.exports = {
addItem
}
item_schema.js
const { Schema, model} = require('mongoose')
const itemSchema = new Schema({
title: {
type: String,
required: [true, 'Title field is required.']
},
description: {
type: String,
required: [true, 'Description field is required.']
},
itemImage: {
type: String,
required: [true, 'Image field is required.']
},
userID: {
type: Schema.Types.ObjectId,
ref: "User",
required: [true, 'User field is required']
},
categoryID: {
type: Schema.Types.ObjectId,
ref: "Category",
required: [true, 'Category field is required']
},
qualityID: {
type: Schema.Types.ObjectId,
ref: "Quality",
required: [true, 'Quality field is required']
},
price: {
type: Number
},
claimed:{
type: Boolean
}
}, {
timestamps: true
})
module.exports = model('Item', itemSchema)
server.js：
const express = require('express')
const cors = require('cors')
const jwt = require('jsonwebtoken')
const multer = require('multer');
const upload = multer({dest: 'itemImages/'});
require('dotenv').config()
require('./db')()
const { addItem } = require('./controllers/item_controller')
const { loginRequired } = require('./controllers/user_controller')
const app = express()
app.use(cors())
app.use(express.json())
app.post('/items', upload.single('itemImage'), loginRequired, addItem)
app.listen(port, () => {
console.log(`Example app listening on port ${port}`)
})
uj5u.com熱心網友回復：
在你的 item_controller.js 中試試這個：
const addItem = (req, res) => {
let itemData = req.body
let itemImage = req.file.path
Item.create({
title: itemData.title,
description: description ,
itemImage: itemImage ,
userID: item.userID ,
categoryID: item.categoryID ,
qualityID: item.qualityID,
//put all data that are required here...
}, (err,, data)=> {
if (err) return handleError(err) //here you custom handleError of Just res.status(400).json(err);
res.status(201).json(data)
})
}
Model.create 作為第一個引數接收要保存在模型中的所有屬性，第二個引數是閉包。
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標籤：javascript 节点.js 表示 猫鼬 穆尔特