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

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0-incubating
• Fix Version/s: 3.1.3, 3.2.1
• Component/s: neo4j
• Assignee: Stephen Mallette
• Reporter: Martijn Maas
• Created: 09/Feb/16 13:11
• Updated: 16/Jun/16 11:50
• Resolved: 16/Jun/16 11:49

Description

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).

Issue Links

• links to: GitHub Pull Request #338