No mechanism to specify 1:M, M:M relationships for correct graphQL export

[mandpd]

It looks like the graphQL exporter assumes 1:1 relationships only between nodes. We are trying to use the arrows.app schema as authoritative and to use the graphQL export without manual modification. There doesn't seem to be a way to indicate 1:M or M:M relationships through the UI.

[Mattang-John]

This is also something effecting our ability to use this tool.

[djanjanin]

I'd love to see this, too.