Aggregation Pipeline Returning Empty Array

[steevej (Steeve Juneau)]

This is quite abnormal.

If

@Abdulrahman_almuhajir

const cards = await Card.find({ collectionId: collectionId });

works, then

@Abdulrahman_almuhajir

cards = await Card.aggregate([
    {
      $match: { collectionId: collectionId },
    },
  ]);

should work.

May be useShuffle is false and the aggregation is not even called.

The call to aggregate() returns a cursor. Do you call toArray() or something similar to get the documents from the cursor?