I'm trying to delete the subobject 'apples' from my documents and update the 'fruitInventory' property, decrease by the amount of apples.

I'm confused on how to proceed, should I use dot notation or do a full text search for apples? I don't know if this matters but you can assume apples will always be in field 1.

// Document 1 
{
    "1": {
        "apples": 3,
        "fruitInventory": 21,
        "oranges": 12,
        "kiwis": 3,
        "lemons": 3
    },
    "2": {
        "bananas": 4,
        "fruitInventory": 12,
        "oranges": 8,
    },
    "_id": "1"
}

// Document 2
{
    "1": {
        "apples": 5,
        "fruitInventory": 10,
        "oranges": 2,
        "pears": 3
    },
    "2": {
        "bananas": 4,
        "fruitInventory": 6,
        "cherries": 2,
    },
    "_id": "2"
}

Result should be like this:

// Document 1 
{
    "1": {
        "fruitInventory": 18,
        "oranges": 12,
        "kiwis": 3,
        "lemons": "3"
    },
    "2": {
        "bananas": 4,
        "fruitInventory": 12,
        "oranges": 8,
    },
    "_id": "1"
}

// Document 2
{
    "1": {
        "fruitInventory": 5,
        "oranges": "2",
        "pears": "3"
    },
    "2": {
        "bananas": 4,
        "fruitInventory": 6,
        "cherries": 2,
    },
    "_id": "2"
}

Thanks in advance for your help.