API: Fix crash in check-in API (PRETIXEU-CT1)

src/pretix/api/views/checkin.py

@@ -966,6 +966,7 @@ class CheckinRPCSearchView(ListAPIView):
     def get_serializer_context(self):
         ctx = super().get_serializer_context()
         ctx['expand'] = self.request.query_params.getlist('expand')
+        ctx['organizer'] = self.request.organizer
         ctx['pdf_data'] = False
         return ctx
 

src/tests/api/test_checkinrpc.py

@@ -932,6 +932,12 @@ def test_search(token_client, organizer, event, clist, clist_all, item, other_it
     assert resp.status_code == 200
     assert [p1] == resp.data['results']
 
+    with django_assert_max_num_queries(25):
+        resp = token_client.get(
+            '/api/v1/organizers/{}/checkinrpc/search/?list={}&search=z3fsn8jyu&expand=item'.format(organizer.slug, clist_all.pk))
+    assert resp.status_code == 200
+    assert resp.data['results'][0]['item']['name']
+
 
 @pytest.mark.django_db
 def test_search_no_list(token_client, organizer, event, clist, clist_all, item, other_item, order):