Ref and Populate in mongoose to a specific field

MongoDB for Academia
,
1

I want to be able to create a product and in the package I of that product I wan to be able to put an id of one of the skus that I have in my storage model and when I GET the product I want it to show the info about that sku I have search for an answer for this for days and I can not find a solution


const ProductSchema = new mongoose.Schema({
    name:{type:String, required:true, unique:true},
    stores:[{
        name:String,
        package:[{
            name:String,
            sku: // i want here to pass one of the skus id and when i populate the product i want it to return that sku info
        }]
    }],

},{timestamps : true})
export default mongoose.models.Product || mongoose.model("Product", ProductSchema);


const storageSchema = new mongoose.Schema({
    name:String,
    region:[{
        name:String,
        skus:[{
            name:String,
            variant:[{
                name:String,
            }]
        }]
}]
},{timestamps: true})
export default mongoose.models.Storage || mongoose.model("Storage", storageSchema);

//example of the resposnse i want 
{
    "_id": "6402ec724db3304dfc134069",
    "name": "product Name",
    "stores": [
        {
            "name": "Store Name",
            "package": [
                {
                    "name": "package name",
                    "sku" : [{
                        "name":"sku name",
                        "variant":[{
                            "name":"variant name"
                        },
                        {
                            "name":"variant name"
                        },
                        {
                            "name":"variant name"
                        },
                        {
                            "name":"variant name"
                        },]
                    }]
                    "_id": "6402ee69c737a9d40948d522"
                }
            ],
            "_id": "6402ede4c737a9d40948d4f9"
        }
    ],
}

//example of the storage data 
{
    "_id": "63f43de1b8604ed5c5c99f02",
    "StorageName": "Storage Name",
    "region": [
        {
            "name": "region name",
            "_id": "63f43e9eb8604ed5c5c99f48",
            "skus": [
                {
                    "name": "first sku",
                    "variant":[{
                        "name":"variant name"
                    },
                    {
                        "name":"variant name"
                    },
                    {
                        "name":"variant name"
                    },
                    {
                        "name":"variant name"
                    },],
                    "_id": "63f4c734b8604ed5c5c99f99"
                },
                {
                    "name": "sec sku",
                    "variant":[{
                        "name":"variant name"
                    },
                    {
                        "name":"variant name"
                    },
                    {
                        "name":"variant name"
                    },
                    {
                        "name":"variant name"
                    },],
                    "_id": "63f4c73ab8604ed5c5c99fa7"
                },
                {
                    "name": "third sku",
                    "_id": "6402baac4db3304dfc133db7"
                }
            ]
        },
        {
            "name": "region name",
            "_id": "63f43ea9b8604ed5c5c99f5b",
            "skus": [
                {
                    "name": "first sku",
                    "_id": "63f4db42cfb1ebe9fafc1ff0"
                },
                {
                    "name": "sec sku",
                    "_id": "63f4db4dcfb1ebe9fafc200a"
                },
                {
                    "name": "third sku",
                    "_id": "63f4db5ccfb1ebe9fafc2027"
                }
            ]
        }
    ],
}