我的猫鼬集合没有将传递的数据保存到数据库中

Question

我使用 mongoose 创建了我的模式，但该集合并未将传递的数据保存到数据库中，事实上该集合位于集合的数据库列表中

模特是

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const MovieSchema = new Schema({
 description: String,
 category: String,
 token:  String,
 fileID: {
  type: Schema.Types.ObjectId,
 }
});

const Movie = mongoose.model('Movies', MovieSchema);

module.exports = Movie;

而保存文档的逻辑是

router.post('/', upload.single('file'), (req, res) => {
    
      
    const movie = new Movie({
        description: req.body.Description,
        category: req.body.Category,
        token: req.body.Description,
        fileID: req.file.id 
    })
    movie.save(function(err){
      if(err){
           console.log(err);
           return;
      }

      res.json({ "success": "true"});
});
 
});

if i console.log(movie) i can see the objects

Answer 1

我尝试使用与您相同的设置：

快递
穆尔特
Multer GridFS 存储
猫鼬

它似乎有效（得到 { success: true } 响应和存储在数据库中的内容），正如 mongo 控制台会话的摘录所示：

> db.movies.find();
{ "_id" : ObjectId("5c02a7ccfe06f6644fc891e7"), "fileID" : ObjectId("5c02a7ccfe06f6644fc891d5"), "__v" : 0 }
> db.fs.files.find();
{ "_id" : ObjectId("5c02a7ccfe06f6644fc891d5"), "length" : 4265368, "chunkSize" : 261120, "uploadDate" : ISODate("2018-12-01T15:25:00.411Z"), "filename" : "d32a3c421f8b7bb1654f2abe13e9cf0f", "md5" : "c6203a2cfee5169a8c90015b99bb7844", "contentType" : "image/jpeg" }

这是我的文件。

主要 Express 应用程序文件

// index.js
const express = require('express');
const mongoose = require('mongoose');
const moviesRouter = require('./routes/movies');

mongoose.connect('mongodb://localhost:27017/movies');

const app = express();

app.use(express.static('public'));
app.use('/api/movies', moviesRouter);

app.listen(8000);

电影模特（和你一样）

// models/Movie.js
const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const MovieSchema = new Schema({
    description: String,
    category: String,
    token:  String,
    fileID: {
        type: Schema.Types.ObjectId,
    }
});

const Movie = mongoose.model('Movies', MovieSchema);

module.exports = Movie;

电影路线（大部分也是您的代码）

// routes/movies.js
const express = require('express');
const multer  = require('multer');

const router = express.Router();
const Movie = require('../models/Movie');

// Create a storage object with a given configuration
const storage = require('multer-gridfs-storage')({
  url: 'mongodb://localhost:27017/movies'
});

// Set multer storage engine to the newly created object
const upload = multer({ storage: storage });

router.post('/', upload.single('file'), (req, res) => {

  const movie = new Movie({
    description: req.body.Description,
    category: req.body.Category,
    token: req.body.Description,
    fileID: req.file.id 
  });
  movie.save(function(err){
    if(err){
      console.log(err);
      return;
    }

    res.json({ "success": "true"});
  });

});

module.exports = router;

HTML 测试页

位于public/index.html

下

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Whosebug mongoose/gridfs question</title>
  </head>
  <body>
    <div id="status"></div>
    <form id="movie" method="POST" enctype="multipart/form-data">

      <label for="file">Choose movie</label>
      <input id="file" type="file" name="file" />

      <input type="submit" value="Send" />
    </form>
    <script>
      const status = document.getElementById('status');
      const form = document.getElementById('movie');
      const fileInput = document.getElementById('file');
      console.log(fileInput);
      form.addEventListener('submit', event => {
        event.preventDefault();
        const formData = new FormData();
        formData.append('file', fileInput.files[0]);

        var request = new XMLHttpRequest();
        request.open('POST', '/api/movies');
        request.onload = function(event) {
          if (request.status == 200) {
            status.innerHTML = 'Sent!';
          } else {
            status.innerHTML = `Error: ${request.status}`;
          }
        };

        request.send(formData);
      });
    </script>
  </body>
</html>

由于我没有你的完整代码，所以很难准确知道问题出在哪里：

您的 mongo 数据库设置好了吗？（例如 use movies;）
当你将数据发送到服务器时，数据编码方式是否有问题（你应该有 multipart/form-data 编码，见截图）

希望这对您有所帮助。

我的猫鼬集合没有将传递的数据保存到数据库中

My mongoose collection not saving the passed data on to the database

javascript

mongoose

mongodb

mongoose-populate

mongoose-schema

主要 Express 应用程序文件

电影模特（和你一样）

电影路线（大部分也是您的代码）

HTML 测试页