SQL: CREATE one and only one EDGE

[gramian]

Hi,
By default all edges are bi-directional.
So if I want to create one and only one edge between to nodes I do:

CREATE EDGE myEdge FROM $src TO $dst IF NOT EXISTS

However, IF NOT EXISTS for CREATE EDGE regards the direction, so I can create another edge with:

CREATE EDGE myEdge FROM $dst TO $src IF NOT EXISTS

Is there a way to create one and only one edge between nodes disregarding direction?

[lvca]

You can define a unique index against @out + @in on edge type.

[lvca]

Check this: https://docs.arcadedb.com/#_indexing-edges

[gramian]

But that would error, right?

[lvca]

Yes, it would raise a index unique exception