Mongoose - Generate ObjectID for each object before saving document

Question

I want generate an ObjectID for each Object present inside my array. The thing is I\'m getting the products with a .forEach statement from another server and push them insid

Answer 1

If you want to add ObjectId automatically, you need to define a separate schema for it and set the _id options for the schema as true.

Do the following:

• Change your productsSchema as CatalogueSchema (for ease of understanding).
• Define a new ProductSchema for Product (element of allProducts)
• In CatalogueSchema define allProducts type as [Product.schema]. This will automatically add _id (ObjectId).

Also, you don't need to add created_at and updated_at as part of schema when you set timestamps option as true.

Catalogue Schema

const Product = require('Product_Schema_Module_Path'); // Edit

const CatalogueSchema = new mongoose.Schema({

    apiKey: String,
    domain: String,
    totalcount: Number,
    totaldone: Number,
    allSKUS: Array,
    allProducts: [Product.schema]   
    // Note the change here (Array -> [Product.schema]
  // Creating a separate schema ensures automatic id (ObjectId)

}, { collection: 'catalogue', timestamps: true });

CatalogueSchema.plugin(uniqueValidator);

const Catalogue = mongoose.model('Catalogue', CatalogueSchema);
module.exports = Catalogue;

Product Schema (New schema to ensure adding of ObjectId)

const ProductSchema = new mongoose.Schema({

    id: Number,
    sku: String,
    name: String,
    status: Number,
    total_images: Number,
    media_gallery_entries: Array

}, { _id: true, timestamps: true });  
// _id option is true by default. You can ommit it.
// If _id is set to false, it will not add ObjectId

ProductSchema.plugin(uniqueValidator);

const Product = mongoose.model('Product', ProductSchema);
module.exports = Product;

EDIT (Save Products in Catalogue)

(Also, note that you have to require the ProductSchema module in your CatalogueSchema module)

// Map userApiProducts.allProducts to array of Product documents
const products = userApiProducts.allProducts.map(product => {
    return new Product(product);
})

const newProduct = {
    apiKey: userApiProducts.apiKey,
    domain: userApiProducts.domain,
    totalcount: userApiProducts.totalcount,
    totaldone: userApiProducts.totaldone,
    allSKUS: userApiProducts.allSKUS,
    allProducts: products
};

Catalogue
    .findOneAndUpdate({ domain: userApiProducts.domain }, newProduct, { upsert:true } , (err, products) => {
    // Handle error
});