When I attempt to UPDATE/UPSERT an Edge using the syntax:
update relationship set in = #123, out = #456 upsert where in = #123 and out = #456
The Edge is created, but the Vertex in and out properties aren't populated, meaning the graph isn't traversible (and is just a collection of floating vertices in the browser).
This is in contrast to a basic CREATE command, which works as expected:
create edge relationship from #123 to #456
How can I make the UPDATE/UPSERT version populate the Vertex properties correctly?
UPDATE EDGE doesn't support UPSERT, see issue #4436