[jira] [Commented] (TINKERPOP-2384) Inject and withSideEffect causing different outcomes in order step

["Stephen Mallette (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TINKERPOP-2384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17137898#comment-17137898 ] 

Stephen Mallette commented on TINKERPOP-2384:
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This seems to have opened a bag of worms a bit. It seems that the problem is that {{select(Traversal)}} was not treating that argument as a local child so side-effects were not properly propagating to it. If I "fix" that then problems start to occur with {{GraphComputer}} tests where it thinks that verifications are being violated with respect to {{PathProcessor}} max requirements. Not sure how to fix this one immediately.

> Inject and withSideEffect causing different outcomes in order step
> ------------------------------------------------------------------
>
>                 Key: TINKERPOP-2384
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2384
>             Project: TinkerPop
>          Issue Type: Bug
>          Components: process
>    Affects Versions: 3.4.6
>         Environment: TinkerGraph @ 3.4.6 , TinkerFactory.createModern() , Gremlin Console
>            Reporter: Kelvin R. Lawrence
>            Priority: Major
>
> I tried creating the following query two different ways. One using _*inject*_ and the other using _*withSideEffect*_. The version using _*inject*_ works as expected and the version using _*withSideEffect*_ causes an exception. As I understand it, in this case the two should be equivalent. When used outside of an *_order().by()_* the _*select*_ steps work fine in my testing
>  
> gremlin> g.inject('name').as('key').V().order().by(valueMap().select(select('key')).unfold()).values('name')
> ==>josh
> ==>lop
> ==>marko
> ==>peter
> ==>ripple
> ==>vadas
> gremlin> g.withSideEffect('key','name').V().order().by(valueMap().select(select('key')).unfold()).values('name')
> The provided traverser does not map to a value: v[1]->[PropertyMapStep(value), TraversalSelectStep([SelectOneStep(last,ke
> y)]), UnfoldStep]
> Type ':help' or ':h' for help.    
> gremlin> g.withSideEffect('key','name').V().valueMap().select(select('key')).unfold()
> ==>marko
> ==>vadas
> ==>lop
> ==>josh
> ==>ripple
> ==>peter



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