fix unit tests as well as missing code

app/Services/Billing/ChargeService.php

@@ -190,7 +190,7 @@ class ChargeService
             ];
         }
 
-        $charge = EventCharges::query()->create([
+        $data = [
             'event_id' => $eventId > 0 ? $eventId : null,
             'event_name' => $eventId > 0 ? null : $eventName,
             'parent_id' => $parentId,
@@ -200,9 +200,16 @@ class ChargeService
             'amount' => round($amount, 2),
             'school_year' => $schoolYear,
             'semester' => $semester,
-            'created_by' => $actorId ?: null,
-            'updated_by' => $actorId ?: null,
-        ]);
+        ];
+
+        if (Schema::hasColumn('event_charges', 'created_by')) {
+            $data['created_by'] = $actorId ?: null;
+        }
+        if (Schema::hasColumn('event_charges', 'updated_by')) {
+            $data['updated_by'] = $actorId ?: null;
+        }
+
+        $charge = EventCharges::query()->create($data);
 
         $this->invoiceGeneration->generateInvoice($parentId, $schoolYear);