AshPostgrespaginate_relationship_with :relay option in the graphql block like we did for all other relationships. For this, AshPostgres errors while using the application, asking to implement the ash_postgres_subquery/4 callback. I thought "no problem, i'll just check the docs and see what it needs", but the documentation on manual relationships for AshPostgres are lackluster: https://hexdocs.pm/ash_postgres/2.6.23/manual-relationships.html or https://hexdocs.pm/ash_postgres/2.6.23/AshPostgres.ManualRelationship.html, the best is a short description of the arguments (which I only really understood after diving into the Ecto docs for a while), but no real explanation about what either this or the other callback (ash_postgres_join/6) are used for or what they should return.no_attributes? true flag and filters. From this I came up with two possible solutions that I tried, both without success.