Database
[{"_id":"61c01098bc29520008efc00f","name":"codedump","employments":[{"type":"PERMANENT","salary":1000000000},{"type":"TEMP","salary":1000000000},{"type":"PART_TIME","salary":1000000000},]}]
Query
db.collection.update({"employments.type":"PERMANENT",},{"$set":{"employments.$.salary":10}},{"multi":false,"upsert":false})