How to insertMany and update duplicates in mongodb?

You can find duplicates as follows, then you can remove them and insert them again.

example:

static async addOrders(ordersArray) {const ordersTable = new mongoose.model('ordersTable', Schemas.ordersTable);try {    const docs = await ordersTable.insertMany(ordersArray, {ordered: false});    return Promise.resolve('Data Inserted');} catch (e) {       if (e.code === 11000){            // 1- getting duplicates            console.log('getting duplicates');            let orders = [];            const ordersIDs = e.result.result.writeErrors.map(error=>{                const parsedError = JSON.stringify(error);                const order = JSON.parse(parsedError).op;                orders.push(order);                return order.orderID;            });            // 2- removing old duplicates.            const deleted = await ordersTable.deleteMany({orderID:{'$in':ordersIDs}});            // 3- adding the orders            try{                const newAddedOrders = await ordersTable.insertMany(orders , {ordered : false});                return Promise.resolve('Data Inserted');            }catch (e) {                return Promise.reject(e);            }        }else return Promise.reject(e);}

}

As you see in the code comments, we are getting duplicates first, then we are removing and inserting the rows.