Use mongodb shell to :Find the products that have not been included in any of the shopping cart.

To find the products that have not been included in any of the shopping cart using MongoDB shell, you can follow the steps below:

1. Connect to your MongoDB instance using the Mongo shell.
2. Run the following query to get a list of all product ids that are present in the shopping cart:

db.shoppingCart.distinct("products.productId")

3. Use the list of product ids obtained in step 2 to find the products that have not been included in any of the shopping cart using the following query:

db.products.find({ _id: { $not: { $in: [ObjectId("id1"), ObjectId("id2"), ...] } } })

Replace `id1`, `id2`, etc. with the product ids obtained in step 2.

This query will return all products that have not been included in any of the shopping cart.