you can use $addToSet to do this:
db.users.aggregate([
{ $unwind: '$data' },
{ $group: { _id: '$_id', data: { $addToSet: '$data' } } }
]);
It’s hard to give you more specific answer without seeing your actual query.
you can use $addToSet to do this:
db.users.aggregate([
{ $unwind: '$data' },
{ $group: { _id: '$_id', data: { $addToSet: '$data' } } }
]);
It’s hard to give you more specific answer without seeing your actual query.