如何使用multer从同一个mongodb集合的多个字段上传文件答案

【问题标题】：How to upload files from multiple fields of same mongodb collection using multer如何使用multer从同一个mongodb集合的多个字段上传文件
【发布时间】：2021-03-24 22:51:27
【问题描述】：

我想从同一个集合的多个字段上传图片。我可以使用一个字段上传。

路由：service.js

router.post('/register', upload.array('daycare.DCImage',10),(req, res) => {
  var paths = req.files.map(file => file.path)
  const newService = new Services(req.body);
  newService.daycare.DCImage = paths
    newService
        .save(newService)
        .then(data => {
            res.send(data);
        })
        .catch(err => {
            res.status(500).send({
              message:
                err.message || "Some error occurred while creating the Service."
            });
        });
})

像 daycare.DCImage 我想做 grooming.groomingImage、trainer.TrainingImage、dogwalker.DWImage , breeding.breedingImages 字段也便于上传图片。

此代码目前运行良好，如何更改代码以获得所需的功能？

我尝试包含额外的 upload.array() 之类的

router.post('/register', upload.array('daycare.DCImage',10), upload.array('grooming.GroomingImage',10 ), upload.array('dogwalker.DWImage', 10) , upload.array('trainer.TrainingImage', 10 ), upload.array('breeding.breedingImage', 10) ,(req, res) )

以及同一个upload.array()中的其他字段

router.post('/register', upload.array('daycare.DCImage', 'grooming.GroomingImage', 'trainer.TrainingImage' , 'breeding.breedingImage', 10),(req, res) )

但它不起作用。

这是模型 service.js

const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const User = require('./User');
const ServiceSchema = new Schema({    
    daycare : {
        description : {type : String},
        DCImage : [{type : String}],
        additionalServices : {type : String},
    },
    grooming : {
        description : {type : String},
        GroomingImage : [{type : String}],
        additionalServices : {type : String},
    },
    dogwalker : {
        description : {type : String},
        DWImage : [{type : String}],
        additionalServices : {type : String},
    },
    trainer : {
       
        description : {type : String},
        TrainingImage : [{type : String}],
        price : {
            daily : {type : String},
            weekly : {type : String},
            monthly : {type : String}
        },
        additionalServices : {type : String},
    },
    breeding : {
        breed : {type : String},
        age : {type : String},      
        breedingImages:[{type:String}],        
    },
});
module.exports = Services = mongoose.model('Services', ServiceSchema);

【问题讨论】：

请检查：stackoverflow.com/a/36096893/5433067

标签： node.js mongodb express multer

【解决方案1】：

使用多路上传。字段像这样，

router.post('/register', upload.fields([
    { name: "field_name", maxCount: 1 },
    { name: "field_name", maxCount: 1 },
    { name: "field_name", maxCount: 1 },
    { name: "field_name", maxCount: 1 }
  ])
  ,(req, res) );

然后像这样上传函数，

const upload = multer({
  storage: 'path-to-storage',
  limits: { fileSize: 100000 },
  key: function (req, file, cb) {
    cb(null, file.originalname);
  },
});

【讨论】：