Can't grab edges by id, but can grab vertices by id

[Olav Laudy]

Hi,

This is my sample db:

['Vertex:',
 {'id': 91, 'label': 'object1', 'properties': {'name': 1}},
 'Vertex:',
 {'id': 93, 'label': 'object1', 'properties': {'name': 2}},
 'Vertex:',
 {'id': 95, 'label': 'object1', 'properties': {'name': 3}}]

['Edge:',
 {'id': 97,
  'inV': 93,
  'inVLabel': 'object1',
  'label': 'obs1',
  'outV': 91,
  'outVLabel': 'object1',
  'properties': {'x': 'x1'}},
 'Edge:',
 {'id': 98,
  'inV': 93,
  'inVLabel': 'object1',
  'label': 'obs1',
  'outV': 91,
  'outVLabel': 'object1',
  'properties': {'x': 'x2'}},
 'Edge:',
 {'id': 99,
  'inV': 95,
  'inVLabel': 'object1',
  'label': 'obs1',
  'outV': 93,
  'outVLabel': 'object1',
  'properties': {'x': 'x3'}}]


I can do:

g.V(91) or 
g.V().has(id,91)
g.V().hasId(91)

resulting in:

['Vertex:', {'id': 91, 'label': 'object1', 'properties': {'name': 1}}]


by I can't  do:

g.E(97) or 
g.E().has(id,97)
g.E().hasId(97)

They all come back as {'@value': [], '@type': 'g:List'}


I know that using id is not the best way to grab an object, but for quick testing purposes, it can be very handy (as per Tinkerpop documentation where that happens all the time).

Also, I know how the 'true' argument in .valueMap(true) returns all system ids, but I'm unable to refer to them:

e.g., for this edge, give me inV or inVLabel. How do I do that?



Thanks! 

[Daniel Kuppitz]

Can you provide more information? Are you using TinkerGraph? Which version? How did you create the graph?

A simple test worked fine for me:

gremlin> g = TinkerFactory.createModern().traversal()

==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]

gremlin> g.E()

==>e[7][1-knows->2]

==>e[8][1-knows->4]

==>e[9][1-created->3]

==>e[10][4-created->5]

==>e[11][4-created->3]

==>e[12][6-created->3]

gremlin> g.E(7)

==>e[7][1-knows->2]

Usually, these kinds of problems are datatype related. Check the type of your edge ids.

gremlin> g.E().id().next().class

==>class java.lang.Integer

If it's a Long, try: g.E(97L)

Cheers,

Daniel

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[Olav Laudy]

That's it!  g.E(97L) works!

I'm using Tinkergraph, with Gremlin 3.3.1

ok...it's due to my own doing:

I copied some stuff from the internet to populate my tinkergraph-empty properties (mainly to store the graph upon exit). it contains:

gremlin.graph=org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph

gremlin.tinkergraph.vertexIdManager=LONG

gremlin.tinkergraph.graphLocation=graph.graphml

gremlin.tinkergraph.graphFormat=graphml

and indeed....it when I specify that the vertexIdManager is set to LONG, I can only hope that it respects that setting.

Thank you Daniel!

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