Question: how to use Titan CONTAINS and Geo.WITHIN about gremlin-scala HOT 10 CLOSED

a way to dodge the problem is

// gremlin scala
val gs: ScalaGraph = TitanFactory.open(conf)

// using elastic search's geo search
val closests = g.query().has("coords", WITHIN, Geoshape.circle(43.7323099, 7.420435, 0.05)).vertices().iterator
for (elem <- closests) {
  println(elem.getId)
  val node = gs.v(elem.getId)
}

from gremlin-scala.

Sorry I don't have a working titan setup so I cannot actually test it right now, but have you tried something like this:

val gs: ScalaGraph = TitanFactory.open(conf)
val closests = gs.V.has("coords", WITHIN, Geoshape.circle(43.7323099, 7.420435, 0.05)).toList

That should return a List of vertices for which the constraint is true..

from gremlin-scala.

I would like to try but I'm using 2.3 and lack most of the features described in the test like toList.
Is there a repos with a current snapshot or should I build from source?

from gremlin-scala.

Sorry for the delay, I had a very busy time. I ran the below with Gremlin 2.3.0 and it works fine (just put it in a unit test or App or so):

val graph = TinkerGraphFactory.createTinkerGraph
println(graph.V.has("name", "marko").toList)
// prints: [v[1]] 

The reason you don't have toList is because you don't use graph.V like me, but graph.query.
HTH?

from gremlin-scala.

for toList, yes I had a wrong dependency.

for the answer to the initial question, no:

scala> val res = g.query().has("coords", WITHIN, Geoshape.circle(43.737239900000006, 7.423498500000001, .05)).vertices().iterator
res: java.util.Iterator[com.tinkerpop.blueprints.Vertex] = com.google.common.collect.Iterators$7@2476704e

    scala> val res2 = gs.query().has("coords", WITHIN, Geoshape.circle(43.737239900000006, 7.423498500000001, .05)).vertices().iterator
    <console>:14: error: type mismatch;
     found   : com.thinkaurelius.titan.core.attribute.Geoshape
     required: com.tinkerpop.blueprints.Query.Compare
           val res2 = gs.query().has("coords", WITHIN, Geoshape.circle(43.737239900000006, 7.423498500000001, .05)).vertices().iterator

where:

  // the titan graph
  val g = TitanFactory.open(conf)

  // gremlin-scala wrapper
  val gs = new ScalaGraph(g)

from gremlin-scala.

right, I had a quick look at Geoshape the other day and didn't see how it's related to Compare. Turns out it's not. I'll add support for that in 2.4.1, but now I'm going to focus on the 2.4.0 release.

from gremlin-scala.

ok thanks and btw great job!!

from gremlin-scala.

I've just had a look at what you're trying to do there...
gs.query returns you a GraphQuery, which doesn't have a Scala wrapper (like ScalaGraph wraps Graph).

I.e. you are working directly with a standard blueprints GraphQuery and that will work just fine, given that you use the correct types. As the compiler tells you, you're trying to pass in a Geoshape, while it's expecting a Query.Compare object.

I haven't actually done that myself, but I believe you need to make sure your GraphQuery is an instance of TitanGraphQuery, which supports a "has(String key, Relation relation, Object condition)". Your WITHIN is a relation, right?

I guess this is more a titan related question, not so much Gremlin Scala?

from gremlin-scala.

TitanIndexTest.java in titan-test contains some example usage of WITHIN. Maybe that helps?

https://github.com/thinkaurelius/titan/blob/02e3f571f772577c309f65cb8e9446f232793dae/titan-test/src/main/java/com/thinkaurelius/titan/graphdb/TitanIndexTest.java

from gremlin-scala.

yes it's true, it is more a titan related problem. The solution is to use ScalaGraph as a wrapper and keep TitanGraph for this kind of query:

val g = TitanFactory.open(conf)
val gs = new ScalaGraph(g)
g.query().has("coords", WITHIN, Geoshape.circle(43.737239900000006, 7.423498500000001, .05)).vertices()

you can close the issue (I did not opened it myself)
thanks for your help

from gremlin-scala.