使用Node.js/Express和Mongoose将图像存储在MongoDB中 [英] Store an image in MongoDB using Node.js/Express and Mongoose

问题描述

当前，我使用angular-file-upload处理图像上传，我只是将图像保存到服务器的文件系统中，并在HTML中引用它.但是，我想尝试将图像直接存储在为博客文章定义的Schema中的数据库中.

Currently I handle image uploads using angular-file-upload and I simply save the image to the server's file system and reference it in the HTML. However, I want to try and store the image directly in the database within the Schema I defined for my blog posts.

var blogSchema = new Schema({
    title: String,
    author: String,
    body: String,
    likes: { type: Number, default: 0 },
    comments: [{ type: Schema.Types.ObjectId, ref: 'Comment' }],
    date: { type: Date, default: Date.now },
    imageURL: String   // instead of this

    image: // store it directly
});

"imageURL: String" stores the path to the image.

我想这样做，这样我就可以拥有一个存储图像本身的字段.我当时在想，也许可以像以前一样上传图像，但是在上传图像之后将其转换并以二进制(或其他形式)存储在Mongo中.这可能吗?

I want to make it so that I can just have a field that stores the image itself. I was thinking that I could perhaps just upload the image like I already do, but instead convert the image after it has been uploaded and store it in binary (or some other form) in Mongo. Is this possible?

谢谢！

推荐答案

下面的示例显示了如何使用猫鼬将图像上传到MongoDB.单击此链接以获取原始来源

This example below shows how to upload an image to MongoDB using mongoose. Click this link for the original source

var express = require('express');
var fs = require('fs');
var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var imgPath = '/path/yourimage.png';

mongoose.connect('localhost', 'testing_storeImg');

var schema = new Schema({
    img: { data: Buffer, contentType: String }
});

var A = mongoose.model('A', schema);

mongoose.connection.on('open', function () {
  console.error('mongo is open');

  A.remove(function (err) {
    if (err) throw err;

    console.error('removed old docs');

    // store an img in binary in mongo
    var a = new A;
    a.img.data = fs.readFileSync(imgPath);
    a.img.contentType = 'image/png';
    a.save(function (err, a) {
      if (err) throw err;

      console.error('saved img to mongo');

      // start a demo server
      var server = express.createServer();
      server.get('/', function (req, res, next) {
        A.findById(a, function (err, doc) {
          if (err) return next(err);
          res.contentType(doc.img.contentType);
          res.send(doc.img.data);
        });
      });

      server.on('close', function () {
        console.error('dropping db');
        mongoose.connection.db.dropDatabase(function () {
          console.error('closing db connection');
          mongoose.connection.close();
        });
      });

      server.listen(3333, function (err) {
        var address = server.address();
        console.error('server listening on http://%s:%d', address.address, address.port);
        console.error('press CTRL+C to exit');
      });

      process.on('SIGINT', function () {
        server.close();
      });
    });
  });

});

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