Diskusi Muhammad Ihsan

Ditanyakan pada: Relasi Data One To Many

TypeError: Cannot read properties of undefined (reading 'push')

TypeError: Cannot read properties of undefined (reading 'push')

const mongoose = require('mongoose');

// connect to mongodb
mongoose.connect('mongodb://127.0.0.1/relation_db')
    .then((result) => {
        console.log('connected to mongodb')
    }).catch((err) => {
        console.log(err)
    });

const farmSchema = new mongoose.Schema({
    name: String,
    city: String,
})

const productSchema = new mongoose.Schema({
    name: String,
    price: Number,
    season: {
        type: String,
        enum: ['Spring', 'Summer', 'Auntum', 'Winter']
    },
    products: [{
        type: mongoose.Schema.Types.ObjectId, // kumpulan id id dari mongo nya sendiri
        ref : 'Product' // untuk mengambil data document/collection dari ObjectId
    }]
})

const Product = mongoose.model('Product', productSchema)
const Farm = mongoose.model('Farm', farmSchema)

const makeFarm = async () => {
    const farm = new Farm({
        name: 'Farm',
        city : 'Serpong',
    })

    const pisang = await Product.findOne({name: 'Pisang'})
    farm.products.push(pisang)
    await farm.save()
    console.log(farm)
}

makeFarm();

Output : TypeError: Cannot read properties of undefined (reading 'push')

Kira kira saya salah dimana ya? terima kasih :)