Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{_id:1,a:[{b:true},{b:true}]},{_id:2,a:[{b:false},{b:true}]},{_id:3,a:[{b:true}]}]
Query
db.collection.find({$expr:{"$allElementsTrue":"$a.b"}})
Result