具有关系的模式未保存在数据库中

Question

我正在使用基本操作 crud 创建一个 api，我正在使用 mongodb 并且我有 1 个模式需要来自另一个模式的信息，我以这种方式建立了关系，在首先 shema 我有这个。

const mongoose = require('mongoose');
const { Schema } = mongoose;

const geographicalAreaSchema = new Schema({
    name: {type: String, required: true}
})

module.exports = mongoose.model('GeographicalArea', geographicalAreaSchema);

带有引用的第二个架构

const mongoose = require('mongoose');
const { Schema } = mongoose;

const zooSchema = new Schema({
    name: { type: String, required: true },
    nit: { type: String, required: true },
    geographicalArea: { type: Schema.ObjectId, ref: "GeographicalArea" }
})

module.exports = mongoose.model('Zoo', zooSchema);

在控制器中有这个代码来保存新的动物园

const zoo = require('../models/zoo');
const mongoose = require('mongoose');
const GeographicalArea = mongoose.model('GeographicalArea');
const zooController = {};

zooController.createZoo = async(req, res) => {
    const saveZoo = new zoo({
        name: req.body.name,
        nit: req.body.nit,
        geographicalAreaName: req.body.geographicalArea.name //this item have data
    });
    await saveZoo.save()
    res.json({
        'status': 'Zoo Save'
    })
};

module.exports = zooController;

这是路由文件

const express = require('express');
const router = express.Router();

const zoo = require('../controllers/zoo.controller');

router.post('/', zoo.createZoo)

module.exports = router;

这是索引文件

const express = require('express');
const morgan = require('morgan');
const app = express();

const { mongoose } = require('./database');

//Settings
app.set('port', process.env.PORT || 3000);

//Middlewares
app.use(morgan('dev'));
app.use(express.json());

//Routes
app.use('/api/geographicalArea', require('./routes/geographicalArea.routes'));
app.use('/api/zoo', require('./routes/zoo.routes'));

//Starting server
app.listen(app.get('port'), () => {
    console.log('Server on port', app.get('port'))
})

当我像这样从 post 人那里发出 post 请求时

我看看req有没有带数据

并且我调试验证数据保存正确，geographicalArea字段returns未定义

我不知道为什么这个属性未定义

Answer 1

试试这个方法。

const zoo = require('../models/zoo')
const mongoose = require('mongoose')
const GeographicalArea = mongoose.model('GeographicalArea')
const zooController = {}

zooController.createZoo: async (req, res) => {
    try {
      const zooInfo = {
        name: req.body.name,
        nit: req.body.nit,
        geographicalAreaName: req.body.geographicalArea.name
      }
      const zooSave = await zoo.create(zooInfo)
      console.log(zooInfo)
      zooSave.save()
      res.json({ status: "zoo saved "})
     } catch(error) {
       res.json({ error })
    }
  }

Answer 2

通过仅从邮递员发送我想与动物园相关的地理区域 ID 来解决问题，这样我就可以获得包含所有信息的对象。

发送数据

    zooController.createZoo = async(req, res) => {
    const saveZoo = new zoo({
        name: req.body.name,
        nit: req.body.nit,
        geographicalArea: req.body.geographicalArea
    });
    await saveZoo.save()
    res.json({
        'status': 'Zoo Save'
    })
};

我确认我得到了数据

具有关系的模式未保存在数据库中

Schema with relationship is not saved in db

crud

mongodb

database-schema

node.js

express