Multiple properties of unknown number gremlin query

Question

I am trying to add multiple properties to a gremlin vertex. Every time i have different number of properties and different properties as well so I need to make the query dynamic based on a Map to create or update the properties. I found this gremlin python - add multiple but an unknown number of properties to a vertex and tried to do the same with the difference that i instantiate a jansugraph but i get an error. Any ideas will be more than welcome.

The below are written in gremlin console directly, then i will translate it to java code.

graph =JanusGraphFactory.open("conf/test.properties")
g = graph.traversal()
test = [["testKey":"testValue"]]
g.inject(test).unfold().as("test")
 .V(20704).as("v").sideEffect(select("test"))
 .unfold().as("kv").select("v")
.property(select("kv").by(Column.keys),select("kv").by(Column.values)).iterate()

and the error i get is

The provided object does not have accessible keys: class org.janusgraph.graphdb.vertices.CacheVertex
Type ':help' or ':h' for help.
Display stack trace? [yN]y
java.lang.IllegalArgumentException: The provided object does not have accessible keys: class org.janusgraph.graphdb.vertices.CacheVertex

Any ideas what i am doing wrong, i cannot find what to use for keys and values regarding Janus

I think you closed the `sideEffect` too soon. The rest of the query until `iterate()` should be inside the `sideEffect` I believe. — Kelvin Lawrence, Mar 30 '20 at 12:59
No worries I'll add an answer just in case others have similar issues. — Kelvin Lawrence, Mar 30 '20 at 13:43
By the way is it possible to be the same for edges by just changing the V to E? Since i tried and get different error. Thanks — jim, Mar 30 '20 at 14:18

score 3 · Accepted Answer · answered Mar 30 '20 at 13:46

The main part of the query needs to be inside the sideEffect step. So something like...

g.inject(test).unfold().as("test").
  V(20704).as("v").
  sideEffect(select("test").
     unfold().as("kv").
     select("v").
     property(select("kv").by(Column.keys),
              select("kv").by(Column.values))).
  iterate()

Multiple properties of unknown number gremlin query

1 Answers1