That is correct.  This is because TinkerPop only supports Property (key/value) on edges.  Vertexes have VertexProperty - http://tinkerpop.apache.org/docs/current/reference/#vertex-properties

See also http://docs.janusgraph.org/latest/schema.html#property-cardinality

Note, that property keys used on edges and properties have cardinality SINGLE. Attaching multiple values for a single key on an edge or property is not supported.

You could create multiple edges instead.

On Wed, Sep 13, 2017 at 04:02 Ankur Goel <an...@...> wrote:

Hi,

I am using embedded (cassandra + ES) janusgraph instance. and using below code to create vertex and edge:

                ManagementSystem mgmt = (ManagementSystem) graph.openManagement();

PropertyKey nameProperty = mgmt.makePropertyKey("names").dataType(String.class).cardinality(Cardinality.SET).make();

PropertyKey yoyoProperty = mgmt.makePropertyKey("yoyo").dataType(String.class).cardinality(Cardinality.SET).make();

mgmt.buildIndex("searchName", Vertex.class).addKey(nameProperty, Mapping.STRING.asParameter()).buildMixedIndex("search");

mgmt.buildIndex("searchYoyo", Vertex.class).addKey(yoyoProperty, Mapping.STRING.asParameter()).buildMixedIndex("search");

EdgeLabel directEdgeLabel = mgmt.makeEdgeLabel("edgeL").make();

mgmt.commit();

// Insert a vertex

Vertex person1 = graph.addVertex();

person1.property("names", "p1");

person1.property("names", "p2");

Vertex person2 = graph.addVertex();

person2.property("names", "p5");

person2.property("names", "p6");

Edge edge = person1.addEdge("edgeL", person2);

edge.property("yoyo", "wow");

edge.property("yoyo", "hello");

graph.tx().commit();

Gremlin Output:

gremlin> g.E().valueMap()

==>{yoyo=hello}

gremlin> g.V().valueMap()

==>{names=[p1, p2]}

==>{names=[p5, p6]}

Looks edge property is not supporting SET cardinality.

Please suggest.

~AnkurG

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