Database
[{"ID":"1","attr1":"123","array":[{"ID":"2","attribute1":"456"},{"ID":"3","attribute1":"567"}]},{"ID":"4","attr1":"123","array":[{"ID":"5","attr1":"456"}]}]
Query
db.collection.aggregate([{"$facet":{"1":[{$match:{"ID":"1"}}],"2":[{$match:{"array.ID":"1"}}],"3":[{$match:{"array.ID":"4"}}],"4":[{$match:{"ID":"4"}}]}}])