Gremlin Java replace old vertex properties with new property

user_4578392 0
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I am trying to use gremlin java to replace some vertex's property like this:
graph.V(1).properties().drop().property("foo", "bar").iterate()

However, this only remove property but doesn't add new property. I think iterate should probably be immediately after drop, but I am connecting to remote graph db so I wish to reduce query count.
Hope there is some way to achieve this:

graph.V(1).properties().drop().property("foo", "bar") .V(2).properties().drop().property("foo", "bar").....iterate()

gremlin
2 Answers

Yes, you can definitely do that, check out the live example: https://gremlify.com/27

You can select the vertex and see it's properties, or run g.V().valueMap(true) and afterwards:

g.V().sideEffect(properties ().drop()).property ("foo", "boo");

To see the new properties applied to it.

(For simplicity, I assumed a single vertex on the graph but this applies for any vertex).

user_128347870

The answer by @gremlify is correct. And alternatively you can use .union() command also.

g.V().union(
    properties().drop(),
    property('foo', 'boo')
);
user_29004710
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