[I] DMN: FOR expression returning a Context produces nested lists [incubator-kie]

["alishaaaqil (via GitHub)" <gi...@apache.org>]

alishaaaqil opened a new issue, #7229:
URL: https://github.com/apache/incubator-kie/issues/7229

   ### Describe the bug
   
   
   A DMN decision with a collection result type returns a nested list when a `for` expression returns a Context containing a single value per iteration.
   For example, the result is `[["aa"], ["bb"], ["cc"]]` instead of `["aa", "bb", "cc"]`. This can cause downstream filtering to return an empty list.
   
   ### Expected behavior
   
   The decision should return a flat list:
   
   ```feel
   ["aa", "bb", "cc"]
   ```
   
   ### Actual behavior
   
   The decision returns a list of singleton lists:
   
   ```feel
   [["aa"], ["bb"], ["cc"]]
   ```
   
   
   Downstream filtering consequently returns an empty list.
   
   ### How to Reproduce?
   
   Create a DMN decision with a collection result type and a `for` expression that returns a Context entry containing one value per iteration.
   
   For example, the intended logic is equivalent to:
   
   ```feel
   for x in ["a", "b", "c"]
   return { value: x }.value
   ```
   
   Evaluate the decision and inspect its result. The values are unexpectedly wrapped in individual lists rather than returned as a flat list.
   
   ### Output of `uname -a` or `ver`
   
   _No response_
   
   ### Output of `java -version`
   
   _No response_
   
   ### GraalVM version (if different from Java)
   
   _No response_
   
   ### Kogito version or git rev (or at least Quarkus version if you are using Kogito via Quarkus platform BOM)
   
   _No response_
   
   ### Build tool (ie. output of `mvnw --version` or `gradlew --version`)
   
   _No response_
   
   ### Additional information
   
   _No response_


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Re: [I] DMN: FOR expression returning a Context produces nested lists [incubator-kie]

["yesamer (via GitHub)" <gi...@apache.org>]

yesamer closed issue #7229: DMN: FOR expression returning a Context produces nested lists
URL: https://github.com/apache/incubator-kie/issues/7229


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