Can't delete/remove multiple property keys on Vertex Titan 1.0 Tinkerpop 3

Question

Very basic question,
I just upgraded my Titan from 0.54 to Titan 1.0 Hadoop 1 / TP3 version 3.01.

I encounter a problem with deleting values of

Property key: Cardinality.LIST/SET

Maybe it is due to upgrade process or just my TP3 misunderstanding.

 // ----- CODE ------:

tg = TitanFactory.open(c);

TitanManagement mg = tg.openManagement();

//create KEY (Cardinality.LIST) and commit changes
tm.makePropertyKey("myList").dataType(String.class).cardinality( Cardinality.LIST).make();
mg.commit();

//add vertex with multi properties

Vertex v = tg.addVertex();

v.property("myList", "role1");
v.property("myList", "role2");
v.property("myList", "role3");
v.property("myList", "role4");
v.property("myList", "role4");

Now, I want to delete all the values "role1,role2...."

// iterate over all values and try to remove the values 
 List<String> values = IteratorUtils.toList(v.values("myList"));
        for (String val : values) {
            v.property("myList", val).remove();
         }
  tg.tx().commit();

//---------------- THE EXPECTED RESULT ----------: Empty vertex properties

But unfortunately the result isn't empty:

System.out.println("Values After Delete" + IteratorUtils.toList(v.values("myList")));

//------------------- OUTPUT --------------:

After a delete, values are still apparent!

15:19:59,780  INFO ThriftKeyspaceImpl:745 - Detected partitioner org.apache.cassandra.dht.Murmur3Partitioner for keyspace titan

15:19:59,784  INFO Values After Delete [role1, role2, role3, role4, role4]

Any ideas?

Answer 1

property(key, value) will set the value of the property on the vertex (javadoc). What you should do is get the VertexProperties (javadoc).

for (VertexProperty vp : v.properties("name")) {
    vp.remove();
}

@jbmusso offered a solid solution using the GraphTraversal instead.