[jboss-jira] [JBoss JIRA] (DROOLS-5280) List Filter expression returning single item and nested within arithmetic expression fails to evaluate

[Tracy Hires (Jira)]

    [ https://issues.redhat.com/browse/DROOLS-5280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14066915#comment-14066915 ] 

Tracy Hires commented on DROOLS-5280:
-------------------------------------

Yes, you're right. I see that the dmn spec in v1.3 made it clear that the FEEL that I've expected to work is not supported. I had missed both the update in the dmn spec and that the reported version of the dmn engine comforms with v1.3. (I'm not positive whether that semantic did work in earlier versions of the redhat dmn engine, but I suspect it did, as I remember finding the automatic conversion of a singleton list to a single instance to be a convenient shorthand) Thank you for taking the time to offer a complete explanation.

> List Filter expression returning single item and nested within arithmetic expression fails to evaluate
> ------------------------------------------------------------------------------------------------------
>
>                 Key: DROOLS-5280
>                 URL: https://issues.redhat.com/browse/DROOLS-5280
>             Project: Drools
>          Issue Type: Bug
>          Components: dmn engine
>    Affects Versions: 7.34.0.Final, 7.36.0.Final
>            Reporter: Tracy Hires
>            Assignee: Matteo Mortari
>            Priority: Major
>         Attachments: MySpace_Relation.zip, screenshot-1.png, screenshot-2.png, screenshot-3.png
>
>
> the expression `addend + listOfStructure[field1="some value"].numberField`, where `field1="some value"` filters `listOfStructure` to a single item and `addend` and `numberField` are both non-null numbers, fails to evaluate. It's possible to work around this by placing `listOfStructure[field1="some value"]` into a separate decision.



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