Fix #2752

app/Api/V1/Controllers/TransactionController.php

@@ -251,6 +251,19 @@ class TransactionController extends Controller
         return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
     }
 
+    /**
+     * Show a single transaction, by transaction journal.
+     *
+     * @param TransactionJournal $transactionJournal
+     *
+     * @return JsonResponse
+     * @codeCoverageIgnore
+     */
+    public function showByJournal(TransactionJournal $transactionJournal): JsonResponse
+    {
+        return $this->show($transactionJournal->transactionGroup);
+    }
+
     /**
      * Store a new transaction.
      *