node.js - 猫鼬推送到数组

Question

我需要将一个对象推入数据库中的数组中，但出现错误。我究竟做错了什么 ？我发现了这样一个主题Push items into mongo array via mongoose but can't proper apply ..................... ..................................................... ..................................................

habalka.files.push({_id: "tata", destination: "Harry"});
    habalka.save((res) => {
      console.log(res)
    });

当我尝试这段代码时，我得到了这个答案

MongooseError：文档在保存之前必须有一个_id

数据库

{
 "_id": "78935e75-86c0-47c2-a76d-2b52a0a71e7c",
    "files": [
        {
            "_id": "67e848e5-7fb0-480b-a1d3-f3a09d1b57f7",
            "destination": "./uploads/78935e75-86c0-47c2-a76d-2b52a0a71e7c",
            "filename": "67e848e5-7fb0-480b-a1d3-f3a09d1b57f7.mp3",
            "path": "uploads\\78935e75-86c0-47c2-a76d-2b52a0a71e7c\\67e848e5-7fb0-480b-a1d3-f3a09d1b57f7.mp3",
            "folder": "78935e75-86c0-47c2-a76d-2b52a0a71e7c",
            "info": {
                "size": 12120000,
                "mimetype": "audio/mp3",
                "encoding": "7bit",
                "originalname": "Попрошайка Евгений Владимирович из ФАСП. Выпуск 10.mp3",
                "fieldname": "selectedFile"
            },
            "date": {
                "$date": "2019-05-23T01:07:27.122Z"
            }
        }
    ],
    "date": {
        "$date": "2019-05-23T01:07:27.123Z"
    },
    "__v": 0
}

架构

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

const HabalkaSchema = new Schema({
  _id: {
    type: String
  },
  files: [
    {
      _id: {
        type: String
      },
      destination: {
        type: String
      },
      filename: {
        type: String
      },
      path: {
        type: String
      },
      folder: {
        type: String
      },
      info: {
        size: {
          type: Number
        },
        mimetype: {
          type: String
        },
        encoding: {
          type: String
        },
        originalname: {
          type: String
        },
        fieldname: {
          type: String
        },
      },
      date: {
        type: Date,
        default: Date.now
      }
    }
  ],
  date: {
    type: Date,
    default: Date.now
  }
});
module.exports = Habalka = mongoose.model('habalka', HabalkaSchema);

要求

let Habalka = habalka.findOne({_id: "78935e75-86c0-47c2-a76d-2b52a0a71e7c"});
Habalka.files.push({destination: "Harry"});
Habalka.save();

标签： node.jsexpressmongoose

Answer 1

我找到了这个解决方案和这个工作。

Habalka.findById("78935e75-86c0-47c2-a76d-2b52a0a71e7c")
  .then(post => {
    console.log(post)
    post.files.unshift({_id: "tata", destination: "vava"});
    post.save().then(res => console.log(res));
  })
  .catch(err => res.status(404).json({ postnotfound: 'No post found' }));