Document must be a valid JavaScript object

Question

I have this script:

let offersToUpdate = [];
let offersToRemove = [];

while (await cursor.hasNext()) {

      let offer = await cursor.next();
      let product = await db.collection('products').findOne({_id: offer.product._id});

      if (product == null) {
        offersToRemove.push(offer._id);
      } else {
        offersToUpdate.push(offer._id);
      }
  }

  await db.collection('offers').update({_id: {$in: offersToUpdate}});
  await db.collection('offers').remove({_id: {$in: offersToRemove}});

When I execute it I have this error:

document must be a valid JavaScript object

Do you have any idea why I have it?

Thanks!

Answer 1

The update method requires two parameters, one filter parameter and another update parameter. As per the code you have only provided one parameter, pls refer to official documentation.