Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"existeTransformacion":true},{"existeTransformacion":false},{"foo":true}]
Query
db.collection.aggregate([{$match:{$or:[{"existeTransformacion":true},{"existeTransformacion":{$exists:false}}]}}])
Result