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gingerbreadboy
gingerbreadboy

Reputation: 7769

MongoDb $where not accepting javascript function

In the MongoDb (v4.0) docs it says we can pass a javascript function to a where clause. I would expect the following trivial example to return zero docs...

let receipts = 
    await db
        .collection<IReceipt>("receipt_txs")
        .find({$where: function () { return false; } } )
        .toArray();

However this returns every doc.

The following syntax works, but for operational reasons i would rather use the above syntax.

let receipts = 
    await db
        .collection<IReceipt>("receipt_txs")
        .find({$where: "function () { return false; }" } )
        .toArray();

let receipts = 
    await db
        .collection<IReceipt>("receipt_txs")
        .find({$where: "false" } )
        .toArray();

Can anyone help me to understand where I'm going wrong? The docs are quite clear, and this syntax has been valid since v2 so I'm sure it can't be a bug.

Upvotes: 0

Views: 65

Answers (1)

Akrion
Akrion

Reputation: 18515

$where with function literals is not compatible with all frameworks. For example it is a feature request in Meteor and not supported out of the box.

Upvotes: 1

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