From c083ce904ae95f7f82305888c9d5af0e9d194797 Mon Sep 17 00:00:00 2001
From: Martin Gross <gross@rami.io>
Date: Fri, 19 Jun 2026 12:41:32 +0200
Subject: [PATCH] Checkin API: Provide 'reason' for RequiredMediaExchangeError
 (PRETIXEU-DHW)

---
 src/pretix/api/views/checkin.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/pretix/api/views/checkin.py b/src/pretix/api/views/checkin.py
index 5016d54f9a..7bafddd3a3 100644
--- a/src/pretix/api/views/checkin.py
+++ b/src/pretix/api/views/checkin.py
@@ -872,6 +872,7 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 'media_policy': e.media_policy,
                 'media_type': e.media_type,
                 'list': MiniCheckinListSerializer(list_by_event[op.order.event_id]).data,
+                'reason': e.code,
                 'reason_explanation': e.msg,
             }, status=400)
         except CheckInError as e: