From 83e4ee23bed94016756c899c954568cb098b9964 Mon Sep 17 00:00:00 2001
From: David Callizaya <davidcallizaya@gmail.com>
Date: Tue, 16 Sep 2025 16:41:57 -0400
Subject: [PATCH 1/2] Add test for process variable assignment with literal ID
 in TaskAssignmentByVariableTest

---
 .../Api/TaskAssignmentByVariableTest.php      | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/tests/Feature/Api/TaskAssignmentByVariableTest.php b/tests/Feature/Api/TaskAssignmentByVariableTest.php
index 2fb5d8d6d3..1d62397894 100644
--- a/tests/Feature/Api/TaskAssignmentByVariableTest.php
+++ b/tests/Feature/Api/TaskAssignmentByVariableTest.php
@@ -250,6 +250,26 @@ public function testProcessVariableAssignmentWithObjectVariable()
         $this->assertEquals($users->first()->id, $task->user_id);
     }
 
+    public function testProcessVariableAssignmentWithLiteralId()
+    {
+        // Create users of a group and a user without group
+        $user = User::factory()->create(['status'=>'ACTIVE']);
+        $group = $this->createGroup(5);
+        $process = $this->createProcess('process_variable', $user->id, $group->id, '', false);
+
+        // The first assignment should be to user (is the first created user)
+        $response = $this->startTestProcess($process, []);
+        $requestId = $response['id'];
+        $task = ProcessRequestToken::where(['process_request_id' => $requestId, 'status' => 'ACTIVE'])->firstOrFail();
+        $this->assertEquals($user->id, $task->user_id);
+
+        // The second assignment should be to the first user of the created group
+        $response = $this->startTestProcess($process, []);
+        $requestId = $response['id'];
+        $task = ProcessRequestToken::where(['process_request_id' => $requestId, 'status' => 'ACTIVE'])->firstOrFail();
+        $this->assertEquals($group->users->first()->id, $task->user_id);
+    }
+
     /**
      * Creates a process in which the assignment of the first task is configured based on the parameters of this function
      *

From 160bc7e87d4b27c18e635df764cd4fa49881de78 Mon Sep 17 00:00:00 2001
From: David Callizaya <davidcallizaya@gmail.com>
Date: Tue, 16 Sep 2025 16:43:40 -0400
Subject: [PATCH 2/2] Implement evaluation of BPMN FEEL expressions for Process
 Variable assignments.

---
 ProcessMaker/Models/Process.php |  4 ++--
 helpers.php                     | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/ProcessMaker/Models/Process.php b/ProcessMaker/Models/Process.php
index ebeb70bc0c..1a7b5da4b6 100644
--- a/ProcessMaker/Models/Process.php
+++ b/ProcessMaker/Models/Process.php
@@ -773,8 +773,8 @@ private function getNextUserFromProcessVariable($activity, $token)
         $dataManager = new DataManager();
         $instanceData = $dataManager->getData($token);
 
-        $assignedUsers = $usersVariable ? Arr::get($instanceData, $usersVariable) : [];
-        $assignedGroups = $groupsVariable ? Arr::get($instanceData, $groupsVariable) : [];
+        $assignedUsers = $usersVariable ? feelExpression($usersVariable, $instanceData) : [];
+        $assignedGroups = $groupsVariable ? feelExpression($groupsVariable, $instanceData) : [];
 
         if (!is_array($assignedUsers)) {
             $assignedUsers = [$assignedUsers];
diff --git a/helpers.php b/helpers.php
index 203e2322c8..1611f418f4 100644
--- a/helpers.php
+++ b/helpers.php
@@ -3,6 +3,7 @@
 use Illuminate\Support\Facades\Auth;
 use Laravel\Horizon\Repositories\RedisJobRepository;
 use ProcessMaker\Events\MarkArtisanCachesAsInvalid;
+use ProcessMaker\Models\FormalExpression;
 use ProcessMaker\Models\Setting;
 use ProcessMaker\SanitizeHelper;
 use ProcessMaker\Support\JsonOptimizer;
@@ -359,3 +360,20 @@ function json_optimize_decode(string $json, bool $assoc = false, int $depth = 51
         return JsonOptimizer::decode($json, $assoc, $depth, $options);
     }
 }
+
+if (!function_exists('feelExpression')) {
+    /**
+     * Evaluate a BPMN FEEL expression
+     *
+     * @param string $expression
+     * @param array $data
+     * @return mixed
+     */
+    function feelExpression(string $expression, array $data)
+    {
+        $formalExp = new FormalExpression();
+        $formalExp->setLanguage('FEEL');
+        $formalExp->setBody($expression);
+        return $formalExp($data);
+    }
+}