[{"database":"db","collection":"a","count":100,"content":{"_id":{"type":"autoincrement","autoType":"int","start":0},"name":{"type":"string","minLength":3,"maxLength":10}}},{"database":"db","collection":"b","count":100000,"content":{"_id":{"type":"autoincrement","autoType":"int","start":0},"aID":{"type":"int","min":0,"max":99},"a":{"type":"object","objectContent":{"_id":{"type":"valueAggregator","database":"db","collection":"a","field":"_id","query":{"_id":"$$aID"}},"name":{"type":"valueAggregator","database":"db","collection":"a","field":"name","query":{"_id":"$$aID"}}}}}}]

db.b.find()