"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.