[jboss-jira] [JBoss JIRA] (DROOLS-2252) "Unable to expand" error with acculumate in Guided Rule Editor with DSL

[Jozef Marko (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-2252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jozef Marko updated DROOLS-2252:
--------------------------------
    Tester: Jozef Marko  (was: Jan Hrcek)


> "Unable to expand" error with acculumate in Guided Rule Editor with DSL
> -----------------------------------------------------------------------
>
>                 Key: DROOLS-2252
>                 URL: https://issues.jboss.org/browse/DROOLS-2252
>             Project: Drools
>          Issue Type: Bug
>          Components: Guided Rule Editor
>    Affects Versions: 7.5.0.Final
>            Reporter: Michael Anstis
>            Assignee: Michael Anstis
>              Labels: support
>
> In Guided Rule Editor with DSL option, you can add "From Accumulate" but "Function"/"Custom Code" gets an error "Unable to expand".
> Reproduce steps:
> - Unzip the attached reproducer-repo.zip
> - Clone the repo via business-central "Administration" > "Repositories" > "Clone Repository"
> - Go to Project Explorer, choose the repo, choose "project1"
> - Go to package org > kie > example > project1. You will find DataObject 'Person,' DSL, Test Scenario
> - Create a new Guided Rule. Check "Use Domain Specific Language (DSL)" option
> - Add conditions (See guidedrule01.png)
> -- DSL "There is a person whose age is 20"
> -- "From Accumulate ..."
> --- Choose "Number" for the first "click to add pattern..."
> --- Choose "Person" for the second "click to add pattern..."
> --- Configure Variable name "$p" for "All Person with"
> -- Write "count($p)" in Function
> - Save
> - Press "Validate"
> - You will get an error "Unable to expand" (See error01.png)
> This is because "count($p)" line doesn't have preceding ">".
> {noformat}
> rule "gr1"
>         dialect "mvel"
>         when
>                 There is a person whose age is 20
>                 >Number( ) from accumulate ( $p : Person( ),
>                         count($p))
>         then
> end
> {noformat}
> - If you add ">" at the begging of Function (See guidedrule02.png), you don't get the error.
> - But if you close the Editor and reopen the rdslr, the condition is rendered as free form DRL (See guidedrule03.png). So it cannot be a workaround.
> - "Custom Code" has the same problem as "Function". Furthermore, "Custom Code" cannot use ">" because ">" wouldn't be placed at the beginning of the line.



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