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https://issues.apache.org/jira/browse/TINKERPOP-1804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16381192#comment-16381192
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stephen mallette commented on TINKERPOP-1804:
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I've looked at this one from time to time since it was created. I still can't
figure out what can be done here. Ultimately, the only way I can think of to
get the result you want is for the strategy to produce this traversal:
{code}
gremlin>
sg.V().hasLabel("person").has('location','seattle').filter(properties('location').hasValue('seattle').hasNot('endTime')).valueMap()
==>[name:[matthias],location:[seattle]]
{code}
Basically that
{{filter(properties('location').hasValue('seattle').hasNot('endTime'))}} ends
up being responsible for filtering out the "marko" vertex that we don't want.
Not sure how to make {{SubgraphStrategy}} do that....
I'd say that right now, the {{vertexProperties()}} configuration on the
{{SubgraphStrategy.Builder}} really is only responsible for filtering out what
shows up in calls to things like {{valueMap()}}. It can't do anything to build
up more complex filters for vertices. The two configurations operate
independently from one another.
> Has step doesn't consider strategy vertexProperty filters
> ---------------------------------------------------------
>
> Key: TINKERPOP-1804
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1804
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.2.3
> Reporter: Simone Cattani
> Priority: Major
>
> Has step, when used in a traversal defined with strategies, doesn't consider
> filters applied on properties by the strategies
> Let's consider the crew example adding an old location for Marko, in Seattle,
> the current Matthias' location.
> {code}
> graph = TinkerFactory.createTheCrew()
> g = graph.traversal()
> g.V().has('name', 'marko').property('location', 'seattle', 'startTime', 1994,
> 'endTime', 1997)
> {code}
> Defining a strategy that considers just current location I can correctly
> obtain the list of current locations
> {code}
> g.withStrategies(SubgraphStrategy.build().vertexProperties(or(hasLabel(neq('location')),hasNot('endTime'))).create()).V().hasLabel("person").valueMap()
> ==>[name:[marko],location:[santa fe]]
> ==>[name:[stephen],location:[purcellville]]
> ==>[name:[matthias],location:[seattle]]
> ==>[name:[daniel],location:[aachen]]
> {code}
> But requiring people (currently) living in Seattle, I obtain Marko, too
> {code}
> g.withStrategies(SubgraphStrategy.build().vertexProperties(or(hasLabel(neq('location')),hasNot('endTime'))).create()).V().hasLabel("person").has('location',
> 'seattle').valueMap()
> ==>[name:[marko],location:[santa fe]]
> ==>[name:[matthias],location:[seattle]]
> {code}
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