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javatinkerpoptinkerpop3

Tinkerpop: Set Label After Creating Vertex

Is there a way to set the T.label after the vertex has been created. I have tried the following:

Vertex v = graph.addVertex();
v.property(T.label.name(), "test");

But when I try the following traversal:

graph.traversal().V().hasLabel("test").next

I get 

org.apache.tinkerpop.gremlin.process.traversal.util.FastNoSuchElementException

Is there something special about T.label that limits it to being set at the step of constructing the vertex ?

Solution

  • No, labels cannot be changed. If you need this type of functionality, you should use a vertex property instead.

    From the TinkerPop documentation: "NOTE: In TinkerPop3, vertices are allowed a single immutable string label (similar to an edge label). This functionality did not exist in TinkerPop2. Likewise, element id’s are immutable as they were in TinkerPop2."