I am working with node and trying to update data with a date stamp in a nested array of objects. My data structure is as follows:

{
_id:629f2f5e7aa147d6503957d0
kid_id:"629f2f5e7aa147d6503957ce"
inventory: [
    { size: "0", 
      purchased: "0", 
      used: [{}], 
      _id: "111111"
     },
    { size: "1", 
      purchased: "10", 
      used: [
            { date: "06/08/22", count: "2"}
       ], 
      _id: "222222"
      }
    ]
}

I want to target size 1 and add another object to the “used” array with { date: “06/09/22”, count: “4”}

Long term goal, when there is another “count” entry with existing date, just increment the count. If it is a new date that is when I need a new object in the array.

I started with the code below but this is not right:

router.put('/used', auth, async (req, res) => {
  let kidID = req.body.kid_id;
  let size = req.body.size;

  try {
    const record = await InventoryRecord.updateOne(
      { kid_id: kidID },
      { $inc: { 'inventory.$[el].used': -1 } },
      { arrayFilters: [{ 'el.size': size }] }
    );
    console.log(record);
    res.send(record);
  } catch (error) {
    res.send({ message: error.message });
  }
});

Thanks in advance for any help