Question

我正在尝试创建一个从数据库接收流的吸气剂，

var mongoose = require('mongoose');
var gridfs = require('mongoose-gridfs');
var express = require('express');
var router = express.Router();
var fs = require('fs');


mongoose.connection.on('open', function(){
    const { model: Attachment } = gridfs({
        collection: 'attachments',
        model: 'Attachment',
        mongooseConnection: mongoose.connection
      });

      router.post('/', function(req,res){

        const readStream = fs.createReadStream(req.body.path);
        var split = req.body.path.split('/');

        const options = ({ filename: split[split.length-1] , contentType: 'binary/octet-stream' });

        Attachment.write(options, readStream, (error, file) => {
            if(error)console.log(error);
            res.json(file._id);
        });
    });

   router.get('/', function(req,res){
      Attachment.findById(req.body.id, (error, attachment) => { 
        if(error) console.log(error);
        console.log(attachment);

     });
      Attachment.readById(req.body.id, (error, attachment) => { 
        if(error) console.log(error);
        console.log(attachment);

     });

      res.json(200)
})
})

因此我能够写入数据库，但是由于某种原因，我无法通过readbyId方法检索文件，但是，我可以在同一对象上执行findById。

FindById的输出

   { aliases: [],
  _id: 5c9cda6253479f4fd4473581,
  length: 17474,
  chunkSize: 261120,
  uploadDate: 2019-03-28T14:29:54.684Z,
  filename: 'testphoto.PNG',
  md5: 'a7d86bd3ba3a889a4c99844fb4287fb8',
  contentType: 'binary/octet-stream' }

从ReadById中退出

Error: FileNotFound: file 5c9cda6253479f4fd4473581 was not found

如您所见，可以使用FindById方法找到ID，但不能通过ReadById方法找到ID。在这里，您会找到我正在使用的软件包：

https://www.npmjs.com/package/mongoose-gridfs

如果您需要任何其他信息，请告诉我，我将尽快对其进行编辑。预先谢谢你。

FileNotFound-尝试使用mongoose-gridfs获取文件时

0 个答案: