CosmosDB: Cannot add a vertex where the partition key property has value 'null'.

[devlinse]

Hi,

I'm sure this is dead simple to solve, but I've got a simple query that creates a vertex in Gremlin that's throwing up the above message. When I've manually added things into Cosmos before, I've had to explicitly include the partition key value, but I don't know how to go about doing that with ExRam?

Thanks

[Daniel Weber]

Check out the Gremlinq samples, specifically how a PartitionKey-property is part of the vertex base class and how it's excluded from updates to the vertex.

Hope it helps

[stale]

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[Steven]

I got this working by specifying the key AND the value in the vertex.

    public class Vertex :  IVertex
    {
        public object Id { get; set; }
        public string Label { get; set; }
        public string pk { get; set; }; // change to match your partition key name
    }

then

var marko = await _g
    .AddV(new Person { Name = "Marko", Age = 29, pk = "123" })
    .FirstAsync();