[jira] [Created] (TINKERPOP-1139) [Neo4JGraph] GraphTraversal with SubgraphStrategy removes addLabelStep (as("b"))

[Martijn Maas (JIRA)]

Martijn Maas created TINKERPOP-1139:
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             Summary: [Neo4JGraph] GraphTraversal with SubgraphStrategy removes 
addLabelStep (as("b"))
                 Key: TINKERPOP-1139
                 URL: https://issues.apache.org/jira/browse/TINKERPOP-1139
             Project: TinkerPop
          Issue Type: Bug
    Affects Versions: 3.1.0-incubating
            Reporter: Martijn Maas


I am using the Neo4jGraph with the following SubgraphStrategy:
SubgraphStrategy.build().vertexCriterion(has("isLatest", true)).create();

I have 2 traversals. This one working works:
Map<String, Long> languageCounts =  
searchResult.as("a").inE("isCreatedBy").outV().outE("hasWorkLanguage").inV().as("b").dedup("a",
 "b")
                  .has("wwlanguage_name").<String>groupCount()
        .by("wwlanguage_name").next();

This translates to:
[Neo4jGraphStep([],vertex)@[a], 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
VertexStep(IN,[isCreatedBy],edge), 
TraversalFilterStep([AndStep([[EdgeVertexStep(IN), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([HasStep([isLatest.eq(true)])])], [EdgeVertexStep(OUT), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([HasStep([isLatest.eq(true)])])]])]), EdgeVertexStep(OUT), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
VertexStep(OUT,[hasWorkLanguage],edge), 
TraversalFilterStep([AndStep([[EdgeVertexStep(IN), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([HasStep([isLatest.eq(true)])])], [EdgeVertexStep(OUT), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([HasStep([isLatest.eq(true)])])]])]), 
EdgeVertexStep(IN)@[b], TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([PropertiesStep([wwlanguage_name],property)]), 
DedupGlobalStep([a, b]), GroupCountStep(value(wwlanguage_name))]

This one fails:
Map<String, Long> languageCounts = 
searchResult.as("a").in("isCreatedBy").out("hasWorkLanguage").as("b")
                                                   .dedup("a", 
"b").has("wwlanguage_name")
      .<String>groupCount().by("wwlanguage_name").next();

This translates to:
[Neo4jGraphStep([],vertex)@[a], 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
VertexStep(IN,[isCreatedBy],edge), 
TraversalFilterStep([AndStep([[EdgeVertexStep(IN), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([HasStep([isLatest.eq(true)])])], [EdgeVertexStep(OUT), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([HasStep([isLatest.eq(true)])])]])]), EdgeVertexStep(OUT), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
VertexStep(OUT,[hasWorkLanguage],edge), 
TraversalFilterStep([AndStep([[EdgeVertexStep(IN), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([HasStep([isLatest.eq(true)])])], [EdgeVertexStep(OUT), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([HasStep([isLatest.eq(true)])])]])]), EdgeVertexStep(IN), 
TraversalFilterStep([HasStep([isLatest.eq(true)])]), 
TraversalFilterStep([PropertiesStep([wwlanguage_name],property)]), 
DedupGlobalStep([a, b]), GroupCountStep(value(wwlanguage_name))]

The failing query misses the '@[b]' of the last EdgeVertexStep(IN).



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