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MongoDB - Generating dynamic $or using pipeline variable?

hoping someone can help as I am truly stuck!

I have this query

SwapModel.aggregate([
    {
        $match: {
            organisationId: mongoose.Types.ObjectId(organisationId),
            matchId: null,
            matchStatus: 0,
            offers: {
                $elemMatch: {
                    from: { $lte: new Date(from) },
                    to: { $gte: new Date(to) },
                    locations: { $elemMatch: { $eq: location } },
                    types: { $elemMatch: { $eq: type } },
                },
            },
//problem is HERE
            $or: {
                $map: {
                    input: "$offers",
                    as: "offer",
                    in: {
                        from: { $gte: new Date("$$offer.from") },
                        to: { $lte: new Date("$$offer.to") },
                        location: { $in: "$$offer.locations" },
                        type: { $in: "$$offer.types" },
                    },
                },
            },
        },
    },
    { ...swapUserLookup },
    { $unwind: "$matchedUser" },
    { $sort: { from: 1, to: 1 } },
]);

I'm trying to use the results of the $match document to generate an array for $or. My data looks like this:

[{
    _id: ObjectId("507f1f77bcf86cd799439011"),
    from: ISODate("2023-01-21T06:30:00.000Z"),
    to: ISODate("2023-01-21T18:30:00.000Z"),
    matchStatus: 0,
    matchId: null,
    userId: ObjectId("ddbb8f3c59cf13467cbd6a532"),
    organisationId: ObjectId("246afaf417be1cfdcf55792be"),
    location: "Chertsey",
    type: "DCA",
    offers: [{
        from: ISODate("2023-01-23T05:00:00.000Z"),
        to: ISODate("2023-01-24T07:00:00.000Z"),
        locations: ["Chertsey", "Walton"],
        types: ["DCA", "SRV"],
    }]
}, {
    _id: ObjectId("21575faf348660e8960c0d931"),
    from: ISODate("2023-01-23T06:30:00.000Z"),
    to: ISODate("2023-01-23T18:30:00.000Z"),
    matchStatus: 0,
    matchId: null,
    userId: ObjectId("d6f10351dd8cf3462e3867f56"),
    organisationId: ObjectId("246afaf417be1cfdcf55792be"),
    location: "Chertsey",
    type: "DCA",
    offers: [{
        from: ISODate("2023-01-21T05:00:00.000Z"),
        to: ISODate("2023-01-21T07:00:00.000Z"),
        locations: ["Chertsey", "Walton"],
        types: ["DCA", "SRV"],
    }]
}]

I want the $or to match all documents that have the corresponding from/to/location/type as the current document - the idea is two shifts that could be swapped

If the offers are known (passed as an array to the function calling aggregate), I can do this with:

$or: offers.map((x) => ({
            from: { $gte: new Date(x.from) },
            to: { $lte: new Date(x.to) },
            location: { $in: x.locations },
            type: { $in: x.types },
        }))

BUT I want to be able to do this in an aggregation pipeline when the offers will only be known from the current document, $offers

Is this possible? I've tried $in, $map, $lookup, $filter, $getField but can't get it right and can't get anything from Google as it thinks I want $in (which is the opposite of what I need).

I'm pretty new to MongoDB and am probably approaching this completely wrong but I'd really appreciate any help!

Via Active questions tagged javascript - Stack Overflow https://ift.tt/MqyfUEt
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