Can I name the result of an anonymous traversal without moving the traverser?
I can currently do the following:
I wish I could do something like this instead:
What would you recommend to me? I only want to do
Graph graph = TinkerFactory.createModern();
GraphTraversalSource gts = AnonymousTraversalSource.traversal().withEmbedded(graph);
gts.V().hasLabel("person")
.has("name", "josh")
.where(__.out().has("name", "ripple"))
.project("rippleCreatorName", "rippleName", "rippleLang")
.by("name")
.by(__.out().has("name", "ripple").values("name"))
.by(__.out().has("name", "ripple").values("lang"))
.toList();Graph graph = TinkerFactory.createModern();
GraphTraversalSource gts = AnonymousTraversalSource.traversal().withEmbedded(graph);
gts.V().hasLabel("person")
.has("name", "josh")
.where(__.out().has("name", "ripple"))
.project("rippleCreatorName", "rippleName", "rippleLang")
.by("name")
.by(__.out().has("name", "ripple").values("name"))
.by(__.out().has("name", "ripple").values("lang"))
.toList();I wish I could do something like this instead:
Graph graph = TinkerFactory.createModern();
GraphTraversalSource gts = AnonymousTraversalSource.traversal().withEmbedded(graph);
gts.V().hasLabel("person").has("name", "josh")
.let("ripple", __.out().has("name", "ripple"))
.project("rippleCreatorName", "rippleName", "rippleLang")
.by("name")
.by(__.select("ripple").values("name"))
.by(__.select("ripple").values("lang"))
.toList()Graph graph = TinkerFactory.createModern();
GraphTraversalSource gts = AnonymousTraversalSource.traversal().withEmbedded(graph);
gts.V().hasLabel("person").has("name", "josh")
.let("ripple", __.out().has("name", "ripple"))
.project("rippleCreatorName", "rippleName", "rippleLang")
.by("name")
.by(__.select("ripple").values("name"))
.by(__.select("ripple").values("lang"))
.toList()What would you recommend to me? I only want to do
__.out().has("name", "ripple")__.out().has("name", "ripple") once, because in my project this filter is much longer so there is considerable repeated code.Solution
You could perhaps play around with
storestoregremlin> g.V().hasLabel("person").
......1> has("name", "josh").
......2> where(__.out().has("name", "ripple").store('a')).
......3> project("rippleCreatorName", "rippleName", "rippleLang").
......4> by("name").
......5> by(select('a').unfold().values("name")).
......6> by(select('a').unfold().values("lang"))
==>[rippleCreatorName:josh,rippleName:ripple,rippleLang:java] gremlin> g.V().hasLabel("person").
......1> has("name", "josh").
......2> where(__.out().has("name", "ripple").store('a')).
......3> project("rippleCreatorName", "rippleName", "rippleLang").
......4> by("name").
......5> by(select('a').unfold().values("name")).
......6> by(select('a').unfold().values("lang"))
==>[rippleCreatorName:josh,rippleName:ripple,rippleLang:java] 