Bowofola

Thanks, will try this and get back to you

Plain scala `List` didnt work. Even `Map` doesn't work. Seems like a neptune feature gap, but will try and confirm this.

From Neptune team: > Neptune supports Single and Set cardinality properties when using the Gremlin property() step etc. It currently does not support List cardinality. Now those are all 'TinkerPop'...

I have the same problem. Unfortunately I cant use the id annotation on a case class due to neptune limitations, and it appears the gremlin-scala DSL doesn't allow you do...

```scala val maybeVertexToAdd = MyVertexCC() val vertexToLinkTo = StepLabel[Vertex]() val vertexExists = g.V .has(Key[String]("property"), "someValue") .fold() // https://stackoverflow.com/questions/49758417/cosmosdb-graph-upsert-query-pattern/49758568#49758568 .coalesce( _.unfold(), _.V("idOfVertex") // can replace this with query to find "another...