I encountered an old issue, here are discussions from 2 years ago: https://www.parse.com/questions/help-with-a-simple-relational-query and https://www.parse.com/questions/how-to-get-multilevel-relationship-data
This is a key feature that seemed to be missing in the past, but I still encounter the same error while trying to use "includeKey" on a field of type "Relation" ("field cannot be included because it is not a pointer to another object".
So I'm wondering, is there a way to do this nowadays?
Thank you very much.