Are they ALL indexed by default? Should I index them? If so, how? By directly talking to mongodb?
Thanks!
When you use parse-server you must maintain the DB indexes on your own.
Parse.com did it for you but since parse.com shut down their service and open source it (parse-server) you need to maintain the indexes on your own.
You have multiple options to create indexes in MongoDB:
The must easiest option is 2