我正在尝试构建一个音乐应用程序,并且在使用该应用程序的后端(使用Express)时,我遇到了一个奇怪的问题,即文档未保存在mongo集合中。
我进行了一条张贴路线,用户提交了表单数据,该表单数据包含歌曲的mp3文件和歌曲的名称(以后将有更多数据)。
我正在使用multer来解析多部分表单数据。 我可以使用multer-gridfs-storage将mp3文件保存到mongoDB。我想将歌曲信息(例如名称,艺术家等)保存在另一个集合中,这是该集合的架构:
import mongoose from 'mongoose';
const Schema = mongoose.Schema;
const SongsInfo = new Schema({
name: {
type: String,
required: true,
},
});
const Song = mongoose.model('Song', SongsInfo);
export default Song;
index.js文件:
import Grid from 'gridfs-stream';
import GridFsStorage from 'multer-gridfs-storage';
const app = express();
const conn = mongoose.createConnection(mongoURI);
let gfs;
conn.once('open', () => {
console.log('Connected to mongodb');
gfs = Grid(conn.db, mongoose.mongo);
gfs.collection('songFiles');
});
// storage engine
const storage = new GridFsStorage({
url: mongoURI,
file: (req, file) => new Promise((resolve, reject) => {
crypto.randomBytes(16, (err, buf) => {
if (err) {
return reject(err);
}
const filename = buf.toString('hex') +
path.extname(file.originalname);
let fileInfo;
fileInfo = {
filename,
bucketName: 'songFiles',
};
resolve(fileInfo);
});
}),
});
let upload;
middleWare(app);
app.post('/api/uploadSong', async (req, res) => {
upload = multer({ storage }).any();
upload(req, res, async (err) => {
console.log('in');
if (err) {
// console.log(err);
return res.end('Error uploading file.');
}
const { name } = req.body;
// push a Song into songs collection
const songInfo = new Song({
name,
});
const si = await songInfo.save(); // (*)
console.log(songInfo);
res.json({
songInfo: si,
file: req.file,
});
});
});
在(*)行上,服务器只是冻结,直到请求超时。 控制台上未显示任何错误。不知道该怎么办:(
答案 0 :(得分:0)
我终于解决了这个问题! 所以我所做的就是将模型带入index.js文件,并在这里和那里更改了一些内容。
index.js
const app = express();
mongoose.connect(mongoURI); //(*)
const conn = mongoose.connection; // (*)
let gfs;
conn.once('open', () => {
console.log('Connected to mongodb');
gfs = Grid(conn.db, mongoose.mongo);
gfs.collection('songFiles');
});
// models
const Schema = mongoose.Schema; //(***)
const SongsInfo = new Schema({
name: {
type: String,
required: true,
},
});
const Song = mongoose.model('Song', SongsInfo);
// storage engine
const storage = new GridFsStorage({
url: mongoURI,
file: (req, file) => new Promise((resolve, reject) => {
crypto.randomBytes(16, (err, buf) => {
if (err) {
return reject(err);
}
const filename = buf.toString('hex') + path.extname(file.originalname);
let fileInfo;
if (file.mimetype === 'image/jpeg' || file.mimetype === 'image/png') {
fileInfo = {
filename,
bucketName: 'imageFiles',
};
} else {
fileInfo = {
filename,
bucketName: 'songFiles',
};
}
resolve(fileInfo);
});
}),
});
let upload;
middleWare(app);
app.post('/api/uploadSong', async (req, res) => {
upload = multer({ storage }).any();
upload(req, res, async (err) => {
console.log('in');
if (err) {
return res.end('Error uploading file.');
}
const { name } = req.body;
// push a Song into songs collection
const songInfo = new Song({
name,
});
songInfo.save((er, song) => {
if (!er) {
res.send('err');
} else {
console.log(err, song);
res.send('err');
}
});
});
});
在第(***)行,我使用了已初始化的猫鼬实例。在上一个文件中,我再次从包中将其导入...