[{"_id":{"uuid":"aaa","sectionId":"1"},"name":"tmp"},{"_id":{"uuid":"bbb","sectionId":"2"},"name":"tmp"},{"_id":{"uuid":"ccc","sectionId":"3"},"name":"tmp"}]

db.collection.find({},{"_id":0,"slot_id":"$_id.uuid","id":"$_id.sectionId","slot_name":"$name"})