Mongo DB aggrregation on multiple arrays - mongodb

Question

I want to retrieve from my cart items and bundles that are not deleted.
my cart looks like this:
{
"_id": "589474849d7b3f439797faf1",
"bundles": [{
"id": "57c98e25298cd0f908021c12",
"serial": "xxxx",
"status": ""
}],
"items": [{
"id": "589de9a690d632ccbc10cd64",
"status": "deleted",
"quantity": 1,
"serial": "fffff"
}]
}
What I tried was:
[
{$match: condition},
{$unwind: {"path": "$items", "preserveNullAndEmptyArrays": true}},
{$unwind: {"path": "$bundles", "preserveNullAndEmptyArrays": true}},
{$match: {"items.status": {$ne: "deleted"}}},
{$match: {"bundles.status": {$ne: "deleted"}}},
{
"$group": {
"_id": "$_id",
currency: {$first: "$currency"},
tenant: {$first: "$tenant"},
user: {$first: "$user"},
"items": {"$addToSet": "$items"},
"bundles": {"$addToSet": "$bundles"}
}
}
];
It works fine for all cases except when there is only one deleted item, and multiple bundles. The query return no bundles at all
expected output:
{
"_id": "589474849d7b3f439797faf8",
"items": [{
"id": "589de9a690d632ccbc10cd64",
"quantity": 1,
"serial": "fff"
}, {
"id": "589de9a690d632ccbc10c55",
"quantity": 1,
"serial": "xxx"
}],
"bundles": [{
"id": "57c98e25298cd0f908021c12",
"serial": "pppp"
}]
}

Answer 1

Oh thanks guys I found the solution, filter will do the trick
[{
$match: "condition"
}, {
$project: {
items: {
$filter: {
input: "$items",
as: "item",
cond: {
$ne: ["$$item.status", "deleted"]
}
}
},
bundles: {
$filter: {
input: "$bundles",
as: "bundle",
cond: {
$ne: ["$$bundle.status", "deleted"]
}
}
}
}
}]