在节点/快递中包含插入的数据（如 ObjectId）以响应

Question

我正在尝试在邮递员中插入一个 ObjectId，在 Content-Type 的标头中，我使用 multipart/form-data

并不断收到错误

{
    "errors": {
        "singer": {
            "message": "Cast to ObjectID failed for value \"ObjectId(\"5dcf8dc320742961c8b5a801\")\" at path \"singer\"",
            "name": "CastError",
            "stringValue": "\"ObjectId(\"5dcf8dc320742961c8b5a801\")\"",
            "kind": "ObjectID",
            "value": "ObjectId(\"5dcf8dc320742961c8b5a801\")",
            "path": "singer",
            "reason": {
                "message": "Cast to ObjectId failed for value \"ObjectId(\"5dcf8dc320742961c8b5a801\")\" at path \"singer\"",
                "name": "CastError",
                "stringValue": "\"ObjectId(\"5dcf8dc320742961c8b5a801\")\"",
                "kind": "ObjectId",
                "value": "ObjectId(\"5dcf8dc320742961c8b5a801\")",
                "path": "singer"
            }
        }
    },
    "_message": "Song validation failed",
    "message": "Song validation failed: singer: Cast to ObjectID failed for value \"ObjectId(\"5dcf8dc320742961c8b5a801\")\" at path \"singer\"",
    "name": "ValidationError"
}

这是我的路线代码，并在歌手字段中将 ObjectId 作为 req.body 传递

router.post('/addSoloSong', mp3.single('mp3File'), async (req, res) => {
  console.log(req.file)
  console.log(req.body.singer);

  const newSong = new Song({
    title: req.body.title,
    singer: req.body.singer,
    releaseDate: Date.parse(req.body.releaseDate),
    mp3File: req.file.path,
    createdAt: new Date()
  })
  try {
    let songAdded = await newSong.save()
    res.status(201).json(songAdded)
  } catch (err) {
    console.log(err);

    res.status(400).json(err)
  }
})

并将歌手字段创建为 ObjectId

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

const songSchema = new Schema({
  title: {
    type: String,
    required: true
  },
  singer: {
    type: Schema.Types.ObjectId,
    ref: "Singer",
    required: true
  },
  featureSinger: {
    type: Schema.Types.ObjectId,
    ref: "Singer"
  },
  groupBand: {
    type: Schema.Types.ObjectId,
    ref: 'GroupBand'
  },
  releaseDate: {
    type: Date,
    required: true
  },
  mp3File: {
    type: String,
    required: true,
    ref: "/public/mp3"
  },
  createdAt: {
    type: Date,
    default: null
  },
  updatedAt: {
    type: Date,
    default: null
  },
  deletedAt: {
    type: Date,
    default: null
  },
  assignedAt: {
    type: Date,
    default: null
  }
});

const Song = mongoose.model("Song", songSchema);

module.exports = Song;

我想在将 ObjectId 插入表单数据时传递它，我错过了什么？ 我也想问一下邮递员的mp3File，它说，文件不在你的工作目录中？这是什么意思？

Answer 1

您将歌手值作为字符串发送。

var mongoose = require('mongoose');

router.post('/addSoloSong', mp3.single('mp3File'), async (req, res) => {
  console.log(req.file)
  console.log(req.body.singer);

  const newSong = new Song({
    title: req.body.title,
    singer: mongoose.Types.ObjectId(req.body.singer),
    releaseDate: Date.parse(req.body.releaseDate),
    mp3File: req.file.path,
    createdAt: new Date()
  })
  try {
    let songAdded = await newSong.save()
    res.status(201).json(songAdded)
  } catch (err) {
    console.log(err);

    res.status(400).json(err)
  }
})

这会起作用。