improve check

doc/api/resources/carts.rst

@@ -192,7 +192,7 @@ Cart position endpoints
    * ``attendee_email`` (optional)
    * ``subevent`` (optional)
    * ``expires`` (optional)
-   * ``includes_tax`` (optional, **deprecated**, do not use, will be removed)
+   * ``includes_tax`` (optional, **DEPRECATED**, do not use, will be removed)
    * ``sales_channel`` (optional)
    * ``voucher`` (optional, expect a voucher code)
    * ``addons`` (optional, expect a list of nested objects of cart positions)

doc/api/resources/orders.rst

@@ -1066,6 +1066,7 @@ Creating orders
       * ``valid_until`` (optional, if both ``valid_from`` and ``valid_until`` are **missing** (not ``null``) the availability will be computed from the given product)
       * ``requested_valid_from`` (optional, can be set **instead** of ``valid_from`` and ``valid_until`` to signal a user choice for the start time that may or may not be respected)
       * ``use_reusable_medium`` (optional, causes the new ticket to take over the given reusable medium, identified by its ID)
+      * ``add_to_reusable_medium`` (optional, causes the new ticket to be added to the given reusable medium, identified by its ID)
       * ``discount`` (optional, only possible if ``price`` is set; attention: if this is set to not-``null`` on any position, automatic calculation of discounts will not run)
       * ``answers``
 

doc/api/resources/reusablemedia.rst

@@ -21,12 +21,16 @@ id                                    integer                    Internal ID of
 type                                  string                     Type of medium, e.g. ``"barcode"``, ``"nfc_uid"`` or ``"nfc_mf0aes"``.
 organizer                             string                     Organizer slug of the organizer who "owns" this medium.
 identifier                            string                     Unique identifier of the medium. The format depends on the ``type``.
+claim_token                           string                     Secret token to claim ownership of the medium (or ``null``)
+label                                 string                     Label to identify the medium, usually something human readable (or ``null``)
 active                                boolean                    Whether this medium may be used.
 created                               datetime                   Date of creation
 updated                               datetime                   Date of last modification
 expires                               datetime                   Expiry date (or ``null``)
 customer                              string                     Identifier of a customer account this medium belongs to.
-linked_orderposition                  integer                    Internal ID of a ticket this medium is linked to.
+linked_orderpositions                 list of integer            Internal IDs of tickets this medium is linked to.
+linked_orderposition                  integer                    **DEPRECATED.** ID of the ticket the medium is linked to, if it is linked to 
+                                                                 only one ticket. ``null``, if the medium is linked to none or multiple tickets.
 linked_giftcard                       integer                    Internal ID of a gift card this medium is linked to.
 info                                  object                     Additional data, content depends on the ``type``. Consider
                                                                  this internal to the system and don't use it for your own data.
@@ -39,6 +43,14 @@ Existing media types are:
 - ``nfc_uid``
 - ``nfc_mf0aes``
 
+
+.. versionchanged:: 2025.11
+
+   The ``claim_token``, ``label``, ``linked_orderpositions`` attributes have been added, the ``linked_orderposition`` attribute has been
+   deprecated. Note: To maintain backwards compatibility ``linked_orderposition`` contains the internal ID of the linked order position
+   if the medium has exactly one order position in ``linked_orderpositions``.
+
+
 Endpoints
 ---------
 
@@ -77,6 +89,7 @@ Endpoints
             "active": True,
             "expires": None,
             "customer": None,
+            "linked_orderpositions": [],
             "linked_orderposition": None,
             "linked_giftcard": None,
             "notes": None,
@@ -92,10 +105,13 @@ Endpoints
    :query string customer: Only show media linked to the given customer.
    :query string created_since: Only show media created since a given date.
    :query string updated_since: Only show media updated since a given date.
+   :query integer linked_orderpositions: Only show media linked to the given tickets. Note: you can pass multiple ticket IDs by passing
+                         ``linked_orderpositions`` multiple times. Any medium matching any linked orderposition will be returned.
    :query integer linked_orderposition: Only show media linked to the given ticket.
    :query integer linked_giftcard: Only show media linked to the given gift card.
-   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_giftcard.owner_ticket"``, ``"linked_orderposition"``,
-                         or ``"customer"``, the respective field will be shown as a nested value instead of just an ID.
+   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_giftcard.owner_ticket"``, ``"linked_orderpositions"``,
+                         ``"linked_orderposition"`` (**DEPRECATED**), or ``"customer"``, the respective field will be shown 
+                         as a nested value instead of just an ID.
                          The nested objects are identical to the respective resources, except that order positions
                          will have an attribute of the format ``"order": {"code": "ABCDE", "event": "eventslug"}`` to make
                          matching easier. The parameter can be given multiple times.
@@ -134,6 +150,7 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
+        "linked_orderpositions": [],
         "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
@@ -191,6 +208,7 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
+        "linked_orderpositions": [],
         "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
@@ -198,9 +216,9 @@ Endpoints
       }
 
    :param organizer: The ``slug`` field of the organizer to look up a medium for
-   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderposition"``, oder ``"customer"``, the respective
+   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderpositions"``, or ``"customer"``, the respective
                          field will be shown as a nested value instead of just an ID. The nested objects are identical to
-                         the respective resources, except that the ``linked_orderposition`` will have an attribute of the
+                         the respective resources, except that the ``linked_orderpositions`` each will have an attribute of the
                          format ``"order": {"code": "ABCDE", "event": "eventslug"}`` to make matching easier. The parameter
                          can be given multiple times.
    :statuscode 201: no error
@@ -227,6 +245,7 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
+        "linked_orderpositions": [],
         "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
@@ -251,6 +270,7 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
+        "linked_orderpositions": [],
         "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
@@ -258,7 +278,7 @@ Endpoints
       }
 
    :param organizer: The ``slug`` field of the organizer to create a medium for
-   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderposition"``, oder ``"customer"``, the respective
+   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderpositions"``, or ``"customer"``, the respective
                          field will be shown as a nested value instead of just an ID. The nested objects are identical to
                          the respective resources, except that the ``linked_orderposition`` will have an attribute of the
                          format ``"order": {"code": "ABCDE", "event": "eventslug"}`` to make matching easier. The parameter
@@ -287,7 +307,7 @@ Endpoints
       Content-Length: 94
 
       {
-        "linked_orderposition": 13
+        "linked_orderpositions": [13, 29]
       }
 
    **Example response**:
@@ -308,7 +328,8 @@ Endpoints
         "active": True,
         "expires": None,
         "customer": None,
-        "linked_orderposition": 13,
+        "linked_orderpositions": [13, 29],
+        "linked_orderposition": None,
         "linked_giftcard": None,
         "notes": None,
         "info": {}
@@ -316,7 +337,7 @@ Endpoints
 
    :param organizer: The ``slug`` field of the organizer to modify
    :param id: The ``id`` field of the medium to modify
-   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderposition"``, oder ``"customer"``, the respective
+   :query string expand: If you pass ``"linked_giftcard"``, ``"linked_orderpositions"``, or ``"customer"``, the respective
                          field will be shown as a nested value instead of just an ID. The nested objects are identical to
                          the respective resources, except that the ``linked_orderposition`` will have an attribute of the
                          format ``"order": {"code": "ABCDE", "event": "eventslug"}`` to make matching easier. The parameter

src/pretix/api/serializers/media.py

@@ -65,9 +65,11 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
-        if 'linked_giftcard' in self.context['request'].query_params.getlist('expand'):
+        expand_nested = self.context['request'].query_params.getlist('expand')
+
+        if 'linked_giftcard' in expand_nested:
             self.fields['linked_giftcard'] = NestedGiftCardSerializer(read_only=True, context=self.context)
-            if 'linked_giftcard.owner_ticket' in self.context['request'].query_params.getlist('expand'):
+            if 'linked_giftcard.owner_ticket' in expand_nested:
                 self.fields['linked_giftcard'].fields['owner_ticket'] = NestedOrderPositionSerializer(read_only=True, context=self.context)
         else:
             self.fields['linked_giftcard'] = serializers.PrimaryKeyRelatedField(
@@ -76,16 +78,27 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
                 queryset=self.context['organizer'].issued_gift_cards.all()
             )
 
-        if 'linked_orderposition' in self.context['request'].query_params.getlist('expand'):
-            self.fields['linked_orderposition'] = NestedOrderPositionSerializer(read_only=True)
+        # keep linked_orderposition (singular) for backwards compatibility, will be overwritten in self.validate
+        self.fields['linked_orderposition'] = serializers.PrimaryKeyRelatedField(
+            required=False,
+            allow_null=True,
+            queryset=OrderPosition.all.filter(order__event__organizer=self.context['organizer']),
+        )
+
+        if 'linked_orderposition' in expand_nested or 'linked_orderpositions' in expand_nested:
+            self.fields['linked_orderpositions'] = NestedOrderPositionSerializer(
+                many=True,
+                read_only=True
+            )
         else:
-            self.fields['linked_orderposition'] = serializers.PrimaryKeyRelatedField(
+            self.fields['linked_orderpositions'] = serializers.PrimaryKeyRelatedField(
+                many=True,
                 required=False,
                 allow_null=True,
                 queryset=OrderPosition.all.filter(order__event__organizer=self.context['organizer']),
             )
 
-        if 'customer' in self.context['request'].query_params.getlist('expand'):
+        if 'customer' in expand_nested:
             self.fields['customer'] = CustomerSerializer(read_only=True)
         else:
             self.fields['customer'] = serializers.SlugRelatedField(
@@ -97,6 +110,20 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
 
     def validate(self, data):
         data = super().validate(data)
+        if 'linked_orderposition' in data:
+            linked_orderposition = data['linked_orderposition']
+            # backwards-compatibility
+            if 'linked_orderpositions' in data:
+                raise ValidationError({
+                    'linked_orderposition': _('You cannot use linked_orderposition and linked_orderpositions at the same time.')
+                })
+            if self.instance.linked_orderpositions.count() > 1:
+                raise ValidationError({
+                    'linked_orderposition': _('There are more than one linked_orderposition. You need to use linked_orderpositions.')
+                })
+
+            data['linked_orderpositions'] = [linked_orderposition] if linked_orderposition else []
+
         if 'type' in data and 'identifier' in data:
             qs = self.context['organizer'].reusable_media.filter(
                 identifier=data['identifier'], type=data['type']
@@ -109,6 +136,14 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
                 )
         return data
 
+    def to_representation(self, obj):
+        r = super(ReusableMediaSerializer, self).to_representation(obj)
+        ops = r.get('linked_orderpositions')
+        if len(ops) < 2:
+            # add linked_orderposition (singular) for backwards compatibility
+            r['linked_orderposition'] = ops[0] if ops else None
+        return r
+
     class Meta:
         model = ReusableMedium
         fields = (
@@ -118,10 +153,12 @@ class ReusableMediaSerializer(I18nAwareModelSerializer):
             'updated',
             'type',
             'identifier',
+            'claim_token',
+            'label',
             'active',
             'expires',
             'customer',
-            'linked_orderposition',
+            'linked_orderpositions',
             'linked_giftcard',
             'info',
             'notes',

src/pretix/api/serializers/order.py

@@ -1019,13 +1019,15 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
     requested_valid_from = serializers.DateTimeField(required=False, allow_null=True)
     use_reusable_medium = serializers.PrimaryKeyRelatedField(queryset=ReusableMedium.objects.none(),
                                                              required=False, allow_null=True)
+    add_to_reusable_medium = serializers.PrimaryKeyRelatedField(queryset=ReusableMedium.objects.none(),
+                                                                required=False, allow_null=True)
 
     class Meta:
         model = OrderPosition
         fields = ('positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
                   'company', 'street', 'zipcode', 'city', 'country', 'state', 'is_bundled',
                   'secret', 'addon_to', 'subevent', 'answers', 'seat', 'voucher', 'valid_from', 'valid_until',
-                  'requested_valid_from', 'use_reusable_medium', 'discount')
+                  'requested_valid_from', 'use_reusable_medium', 'add_to_reusable_medium', 'discount')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -1037,6 +1039,8 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
         with scopes_disabled():
             if 'use_reusable_medium' in self.fields:
                 self.fields['use_reusable_medium'].queryset = ReusableMedium.objects.all()
+            if 'add_to_reusable_medium' in self.fields:
+                self.fields['add_to_reusable_medium'].queryset = ReusableMedium.objects.all()
 
     def validate_secret(self, secret):
         if secret and OrderPosition.all.filter(order__event=self.context['event'], secret=secret).exists():
@@ -1052,6 +1056,9 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
             )
         return m
 
+    def validate_add_to_reusable_medium(self, m):
+        return self.validate_use_reusable_medium(m)
+
     def validate_item(self, item):
         if item.event != self.context['event']:
             raise ValidationError(
@@ -1125,6 +1132,13 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
             raise ValidationError(
                 {'discount': ['You can only specify a discount if you do the price computation, but price is not set.']}
             )
+
+        if 'use_reusable_medium' in data and 'add_to_reusable_medium' in data:
+            raise ValidationError({
+                'use_reusable_medium': ['You can only specify either use_reusable_medium or add_to_reusable_medium.'],
+                'add_to_reusable_medium': ['You can only specify either use_reusable_medium or add_to_reusable_medium.'],
+            })
+
         return data
 
 
@@ -1540,7 +1554,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 pos_data['attendee_name_parts'] = {
                     '_legacy': attendee_name
                 }
-            pos = OrderPosition(**{k: v for k, v in pos_data.items() if k != 'answers' and k != '_quotas' and k != 'use_reusable_medium'})
+            pos = OrderPosition(**{k: v for k, v in pos_data.items() if k not in ('answers', '_quotas', 'use_reusable_medium', 'add_to_reusable_medium')})
             if simulate:
                 pos.order = order._wrapped
             else:
@@ -1614,6 +1628,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         for pos_data in positions_data:
             answers_data = pos_data.pop('answers', [])
             use_reusable_medium = pos_data.pop('use_reusable_medium', None)
+            add_to_reusable_medium = pos_data.pop('add_to_reusable_medium', None)
             pos = pos_data['__instance']
             pos._calculate_tax(invoice_address=ia)
 
@@ -1655,8 +1670,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                         answ.options.add(*options)
 
                 if use_reusable_medium:
-                    use_reusable_medium.linked_orderposition = pos
-                    use_reusable_medium.save(update_fields=['linked_orderposition'])
+                    use_reusable_medium.linked_orderpositions.set([pos])
                     use_reusable_medium.log_action(
                         'pretix.reusable_medium.linked_orderposition.changed',
                         data={
@@ -1664,6 +1678,15 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                             'linked_orderposition': pos.pk,
                         }
                     )
+                if add_to_reusable_medium:
+                    add_to_reusable_medium.linked_orderpositions.add(pos)
+                    add_to_reusable_medium.log_action(
+                        'pretix.reusable_medium.linked_orderposition.added',
+                        data={
+                            'by_order': order.code,
+                            'linked_orderposition': pos.pk,
+                        }
+                    )
 
         if not simulate:
             for cp in delete_cps:

src/pretix/api/views/checkin.py

@@ -503,11 +503,13 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
     #    with respecting the force option), or it's a reusable medium (-> proceed with that)
     if not op_candidates:
         try:
-            media = ReusableMedium.objects.select_related('linked_orderposition').active().get(
+            media = ReusableMedium.objects.active().annotate(
+                has_linked_orderpositions=Exists(ReusableMedium.linked_orderpositions.through.objects.filter(reusablemedium_id=OuterRef('pk')))
+            ).get(
                 organizer_id=checkinlists[0].event.organizer_id,
                 type=source_type,
                 identifier=raw_barcode,
-                linked_orderposition__isnull=False,
+                has_linked_orderpositions=True,
             )
             raw_barcode_for_checkin = raw_barcode
         except ReusableMedium.DoesNotExist:
@@ -610,7 +612,8 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                     'list': MiniCheckinListSerializer(list_by_event[revoked_matches[0].event_id]).data,
                 }, status=400)
         else:
-            if media.linked_orderposition.order.event_id not in list_by_event:
+            linked_event_ids = media.linked_orderpositions.values_list("order__event_id", flat=True).order_by().distinct()
+            if not any(event_id in list_by_event for event_id in linked_event_ids):
                 # Medium exists but connected ticket is for the wrong event
                 if not simulate:
                     checkinlists[0].event.log_action('pretix.event.checkin.unknown', data={
@@ -636,21 +639,34 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                     'checkin_texts': [],
                     'list': MiniCheckinListSerializer(checkinlists[0]).data,
                 }, status=404)
-            op_candidates = [media.linked_orderposition]
-            if list_by_event[media.linked_orderposition.order.event_id].addon_match:
-                op_candidates += list(media.linked_orderposition.addons.all())
+            op_candidates = []
+            for op in media.linked_orderpositions.all().select_related("order"):
+                op_candidates.append(op)
+                if list_by_event[op.order.event_id].addon_match:
+                    op_candidates += list(op.addons.all())
 
     # 3. Handle the "multiple options found" case: Except for the unlikely case of a secret being also a valid primary
     #    key on the same list, we're probably dealing with the ``addon_match`` case here and need to figure out
     #    which add-on has the right product.
     if len(op_candidates) > 1:
-        op_candidates_matching_product = [
-            op for op in op_candidates
-            if (
-                (list_by_event[op.order.event_id].addon_match or op.secret == raw_barcode or legacy_url_support) and
-                (list_by_event[op.order.event_id].all_products or op.item_id in {i.pk for i in list_by_event[op.order.event_id].limit_products.all()})
-            )
-        ]
+        # only check addons if at most one non-addon-op is in op_candidates
+        # otherwise it is likely a medium linked to multiple orderpositions, which we need to filter based on validity
+        if len([op for op in op_candidates if not op.addon_to]) <= 1:
+            op_candidates_matching_product = [
+                op for op in op_candidates
+                if (
+                    (list_by_event[op.order.event_id].addon_match or op.secret == raw_barcode or legacy_url_support) and
+                    (list_by_event[op.order.event_id].all_products or op.item_id in {i.pk for i in list_by_event[op.order.event_id].limit_products.all()})
+                )
+            ]
+        else:
+            op_candidates_matching_product = [
+                op for op in op_candidates
+                if (
+                    (not op.valid_from or op.valid_from < now()) and
+                    (not op.valid_until or op.valid_until > now())
+                )
+            ]
 
         if len(op_candidates_matching_product) == 0:
             # None of the found add-ons has the correct product, too bad! We could just error out here, but

src/pretix/api/views/media.py

@@ -53,10 +53,12 @@ with scopes_disabled():
         customer = django_filters.CharFilter(field_name='customer__identifier')
         updated_since = django_filters.IsoDateTimeFilter(field_name='updated', lookup_expr='gte')
         created_since = django_filters.IsoDateTimeFilter(field_name='created', lookup_expr='gte')
+        # backwards-compatible
+        linked_orderposition = django_filters.NumberFilter(field_name='linked_orderpositions__id')
 
         class Meta:
             model = ReusableMedium
-            fields = ['identifier', 'type', 'active', 'customer', 'linked_orderposition', 'linked_giftcard']
+            fields = ['identifier', 'type', 'active', 'customer', 'linked_orderpositions', 'linked_giftcard']
 
 
 class ReusableMediaViewSet(viewsets.ModelViewSet):
@@ -75,7 +77,7 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
         ).order_by().values('card').annotate(s=Sum('value')).values('s')
         return self.request.organizer.reusable_media.prefetch_related(
             Prefetch(
-                'linked_orderposition',
+                'linked_orderpositions',
                 queryset=OrderPosition.objects.select_related(
                     'order', 'order__event', 'order__event__organizer', 'seat',
                 ).prefetch_related(
@@ -155,7 +157,6 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
                         type=s.validated_data["type"],
                         identifier=s.validated_data["identifier"],
                     )
-                m.linked_orderposition = None  # not relevant for cross-organizer
                 m.customer = None  # not relevant for cross-organizer
                 s = self.get_serializer(m)
                 return Response({"result": s.data})

src/pretix/api/views/order.py

@@ -194,7 +194,7 @@ with scopes_disabled():
                 )
             ).values('id')
 
-            matching_media = ReusableMedium.objects.filter(identifier=u).values_list('linked_orderposition__order_id', flat=True)
+            matching_media = ReusableMedium.objects.filter(identifier=u).values_list('linked_orderpositions__order_id', flat=True)
 
             mainq = (
                 code
@@ -1036,7 +1036,7 @@ with scopes_disabled():
         search = django_filters.CharFilter(method='search_qs')
 
         def search_qs(self, queryset, name, value):
-            matching_media = ReusableMedium.objects.filter(identifier=value).values_list('linked_orderposition', flat=True)
+            matching_media = ReusableMedium.objects.filter(identifier=value).values_list('linked_orderpositions', flat=True)
             return queryset.filter(
                 Q(secret__istartswith=value)
                 | Q(attendee_name_cached__icontains=value)

src/pretix/base/exporters/reusablemedia.py

@@ -20,12 +20,13 @@
 # <https://www.gnu.org/licenses/>.
 #
 
+from django.db.models import Prefetch
 from django.dispatch import receiver
 from django.utils.formats import date_format
 from django.utils.translation import gettext_lazy as _, pgettext, pgettext_lazy
 
 from ..exporter import ListExporter, OrganizerLevelExportMixin
-from ..models import ReusableMedium
+from ..models import OrderPosition, ReusableMedium
 from ..signals import register_multievent_data_exporters
 
 
@@ -40,7 +41,9 @@ class ReusableMediaExporter(OrganizerLevelExportMixin, ListExporter):
         media = ReusableMedium.objects.filter(
             organizer=self.organizer,
         ).select_related(
-            'customer', 'linked_orderposition', 'linked_giftcard',
+            'customer', 'linked_giftcard',
+        ).prefetch_related(
+            Prefetch('linked_orderpositions', queryset=OrderPosition.objects.select_related("order"))
         ).order_by('created')
 
         headers = [
@@ -58,17 +61,16 @@ class ReusableMediaExporter(OrganizerLevelExportMixin, ListExporter):
         yield self.ProgressSetTotal(total=media.count())
 
         for medium in media.iterator(chunk_size=1000):
-            row = [
+            yield [
                 medium.type,
                 medium.identifier,
                 _('Yes') if medium.active else _('No'),
                 date_format(medium.expires, 'SHORT_DATETIME_FORMAT') if medium.expires else '',
                 medium.customer.identifier if medium.customer_id else '',
-                f"{medium.linked_orderposition.order.code}-{medium.linked_orderposition.positionid}" if medium.linked_orderposition_id else '',
+                ', '.join([f"{op.order.code}-{op.positionid}" for op in medium.linked_orderpositions.all()]),
                 medium.linked_giftcard.secret if medium.linked_giftcard_id else '',
                 medium.notes,
             ]
-            yield row
 
     def get_filename(self):
         return f'{self.organizer.slug}_media'

src/pretix/base/migrations/0297_add_reusablemedium_label.py

@@ -0,0 +1,35 @@
+# Generated by Django 4.2.26 on 2025-11-24 11:32
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0296_invoice_invoice_from_state"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="reusablemedium",
+            name="claim_token",
+            field=models.CharField(max_length=200, null=True),
+        ),
+        migrations.AddField(
+            model_name="reusablemedium",
+            name="label",
+            field=models.CharField(max_length=200, null=True),
+        ),
+        # use temporary related_name "linked_mediums" for ManyToManyField, so we can migrate existing data
+        migrations.AddField(
+            model_name="reusablemedium",
+            name="linked_orderpositions",
+            field=models.ManyToManyField(
+                related_name="linked_mediums", to="pretixbase.orderposition"
+            ),
+        ),
+        migrations.RunSQL(
+            sql="INSERT INTO pretixbase_reusablemedium_linked_orderpositions (reusablemedium_id, orderposition_id) SELECT id, linked_orderposition_id FROM pretixbase_reusablemedium WHERE linked_orderposition_id IS NOT NULL;",
+            reverse_sql="DELETE FROM pretixbase_reusablemedium_linked_orderpositions;",
+        ),
+    ]

src/pretix/base/migrations/0298_reusablemedium_remove_orderposition.py

@@ -0,0 +1,44 @@
+# Generated by Django 4.2.26 on 2025-11-24 11:32
+
+from django.db import migrations, models
+
+
+def reverse(apps, schema_editor):
+    ReusableMedium = apps.get_model('pretixbase', 'ReusableMedium')
+
+    qs = ReusableMedium.linked_orderpositions.through.objects
+    objs = []
+    # get last added orderposition from linked_orderpositions
+    for rm_id, op_id in qs.filter(id__in=qs.values("reusablemedium_id").annotate(max_id=models.Max('id')).values('max_id')).values_list("reusablemedium_id", "orderposition_id"):
+        obj = ReusableMedium(
+            id=rm_id,
+            linked_orderposition_id=op_id,
+        )
+        objs.append(obj)
+
+    ReusableMedium.objects.bulk_update(objs, ['linked_orderposition_id'])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0297_add_reusablemedium_label"),
+    ]
+
+    operations = [
+        # according to the docs, UPDATE FROM should run similarly on sqlite and postgres, but I could not get it to work
+        # so roll back the data migration with code before deleting data from through-table in 0297
+        migrations.RunPython(migrations.RunPython.noop, reverse),
+        migrations.RemoveField(
+            model_name="reusablemedium",
+            name="linked_orderposition",
+        ),
+        # change related_name for new ManyToManyField to previously used linked_media
+        migrations.AlterField(
+            model_name="reusablemedium",
+            name="linked_orderpositions",
+            field=models.ManyToManyField(
+                related_name="linked_media", to="pretixbase.orderposition"
+            ),
+        ),
+    ]

src/pretix/base/models/media.py

@@ -72,6 +72,16 @@ class ReusableMedium(LoggedModel):
         max_length=200,
         verbose_name=pgettext_lazy('reusable_medium', 'Identifier'),
     )
+    claim_token = models.CharField(
+        max_length=200,
+        verbose_name=pgettext_lazy('reusable_medium', 'Claim token'),
+        null=True, blank=True
+    )
+    label = models.CharField(
+        max_length=200,
+        verbose_name=pgettext_lazy('reusable_medium', 'Label'),
+        null=True, blank=True
+    )
 
     active = models.BooleanField(
         verbose_name=_('Active'),
@@ -89,12 +99,14 @@ class ReusableMedium(LoggedModel):
         on_delete=models.SET_NULL,
         verbose_name=_('Customer account'),
     )
-    linked_orderposition = models.ForeignKey(
+    linked_orderpositions = models.ManyToManyField(
         OrderPosition,
-        null=True, blank=True,
         related_name='linked_media',
-        on_delete=models.SET_NULL,
-        verbose_name=_('Linked ticket'),
+        verbose_name=_('Linked tickets'),
+        help_text=_(
+            'If you link to more than one ticket, make sure there is no overlap in validity. '
+            'If multiple tickets are valid at once, this will lead to failed check-ins.'
+        )
     )
     linked_giftcard = models.ForeignKey(
         GiftCard,

src/pretix/base/services/orders.py

@@ -3471,8 +3471,8 @@ def signal_listener_issue_media(sender: Event, order: Order, **kwargs):
                     identifier=mt.generate_identifier(sender.organizer),
                     active=True,
                     customer=order.customer,
-                    linked_orderposition=p,
                 )
+                rm.linked_orderpositions.add(p)
                 rm.log_action(
                     'pretix.reusable_medium.created',
                     data={

src/pretix/control/forms/filter.py

@@ -1616,7 +1616,7 @@ class ReusableMediaFilterForm(FilterForm):
                 Q(identifier__icontains=query)
                 | Q(customer__identifier__icontains=query)
                 | Q(customer__external_identifier__istartswith=query)
-                | Q(linked_orderposition__order__code__icontains=query)
+                | Q(linked_orderpositions__order__code__icontains=query)
                 | Q(linked_giftcard__secret__icontains=query)
             )
 

src/pretix/control/forms/organizer.py

@@ -83,7 +83,7 @@ from pretix.control.forms import ExtFileField, SplitDateTimeField
 from pretix.control.forms.event import (
     SafeEventMultipleChoiceField, multimail_validate,
 )
-from pretix.control.forms.widgets import Select2
+from pretix.control.forms.widgets import Select2, Select2Multiple
 from pretix.multidomain.models import KnownDomain
 from pretix.multidomain.urlreverse import build_absolute_uri
 
@@ -246,6 +246,12 @@ class SafeOrderPositionChoiceField(forms.ModelChoiceField):
         return f'{op.order.code}-{op.positionid} ({str(op.item) + ((" - " + str(op.variation)) if op.variation else "")})'
 
 
+class SafeOrderPositionMultipleChoiceField(forms.ModelMultipleChoiceField):
+    def __init__(self, queryset, **kwargs):
+        queryset = queryset.model.all.none()
+        super().__init__(queryset, **kwargs)
+
+
 class EventMetaPropertyForm(I18nModelForm):
     class Meta:
         model = EventMetaProperty
@@ -828,12 +834,12 @@ class ReusableMediumUpdateForm(forms.ModelForm):
 
     class Meta:
         model = ReusableMedium
-        fields = ['active', 'expires', 'customer', 'linked_giftcard', 'linked_orderposition', 'notes']
+        fields = ['active', 'expires', 'customer', 'linked_giftcard', 'linked_orderpositions', 'notes']
         field_classes = {
             'expires': SplitDateTimeField,
             'customer': SafeModelChoiceField,
             'linked_giftcard': SafeModelChoiceField,
-            'linked_orderposition': SafeOrderPositionChoiceField,
+            'linked_orderpositions': SafeOrderPositionMultipleChoiceField,
         }
         widgets = {
             'expires': SplitDateTimePickerWidget,
@@ -843,8 +849,8 @@ class ReusableMediumUpdateForm(forms.ModelForm):
         super().__init__(*args, **kwargs)
         organizer = self.instance.organizer
 
-        self.fields['linked_orderposition'].queryset = OrderPosition.all.filter(order__event__organizer=organizer).all()
-        self.fields['linked_orderposition'].widget = Select2(
+        self.fields['linked_orderpositions'].queryset = OrderPosition.all.filter(order__event__organizer=organizer).all()
+        self.fields['linked_orderpositions'].widget = Select2Multiple(
             attrs={
                 'data-model-select2': 'generic',
                 'data-select2-url': reverse('control:organizer.ticket_select2', kwargs={
@@ -852,8 +858,8 @@ class ReusableMediumUpdateForm(forms.ModelForm):
                 }),
             }
         )
-        self.fields['linked_orderposition'].widget.choices = self.fields['linked_orderposition'].choices
-        self.fields['linked_orderposition'].required = False
+        self.fields['linked_orderpositions'].widget.choices = self.fields['linked_orderpositions'].choices
+        self.fields['linked_orderpositions'].required = False
 
         self.fields['linked_giftcard'].queryset = organizer.issued_gift_cards.all()
         self.fields['linked_giftcard'].widget = Select2(
@@ -907,12 +913,12 @@ class ReusableMediumCreateForm(ReusableMediumUpdateForm):
 
     class Meta:
         model = ReusableMedium
-        fields = ['active', 'type', 'identifier', 'expires', 'linked_orderposition', 'linked_giftcard', 'customer', 'notes']
+        fields = ['active', 'type', 'identifier', 'expires', 'linked_orderpositions', 'linked_giftcard', 'customer', 'notes']
         field_classes = {
             'expires': SplitDateTimeField,
             'customer': SafeModelChoiceField,
             'linked_giftcard': SafeModelChoiceField,
-            'linked_orderposition': SafeOrderPositionChoiceField,
+            'linked_orderpositions': SafeOrderPositionMultipleChoiceField,
         }
         widgets = {
             'expires': SplitDateTimePickerWidget,

src/pretix/control/logdisplay.py

@@ -733,6 +733,7 @@ class CoreUserImpersonatedLogEntryType(UserImpersonatedLogEntryType):
     'pretix.reusable_medium.created': _('The reusable medium has been created.'),
     'pretix.reusable_medium.created.auto': _('The reusable medium has been created automatically.'),
     'pretix.reusable_medium.changed': _('The reusable medium has been changed.'),
+    'pretix.reusable_medium.linked_orderposition.added': _('A new ticket has been added to the medium.'),
     'pretix.reusable_medium.linked_orderposition.changed': _('The medium has been connected to a new ticket.'),
     'pretix.reusable_medium.linked_giftcard.changed': _('The medium has been connected to a new gift card.'),
     'pretix.email.error': _('Sending of an email has failed.'),

src/pretix/control/templates/pretixcontrol/organizers/reusable_media.html

@@ -82,13 +82,13 @@
                                     </a>
                                 </span>
                             {% endif %}
-                            {% if m.linked_orderposition %}
+                            {% for op in m.linked_orderpositions.all %}
                                 <span class="helper-display-block">
                                     <span class="fa fa-ticket fa-fw"></span>
-                                    <a href="{% url "control:event.order" event=m.linked_orderposition.order.event.slug organizer=request.organizer.slug code=m.linked_orderposition.order.code %}">
-                                        {{ m.linked_orderposition.order.code }}</a>-{{ m.linked_orderposition.positionid }}
+                                    <a href="{% url "control:event.order" event=op.order.event.slug organizer=request.organizer.slug code=op.order.code %}">
+                                        {{ op.order.code }}</a>-{{ op.positionid }}
                                 </span>
-                            {% endif %}
+                            {% endfor %}
                             {% if m.linked_giftcard %}
                                 <span class="helper-display-block">
                                     <span class="fa fa-credit-card fa-fw"></span>

src/pretix/control/templates/pretixcontrol/organizers/reusable_medium.html

@@ -49,13 +49,13 @@
                                     </a>
                                 </span>
                                 {% endif %}
-                                {% if medium.linked_orderposition %}
+                                {% for op in medium.linked_orderpositions.all %}
                                     <span class="helper-display-block">
-                                    <span class="fa fa-ticket fa-fw"></span>
-                                    <a href="{% url "control:event.order" event=medium.linked_orderposition.order.event.slug organizer=request.organizer.slug code=medium.linked_orderposition.order.code %}">
-                                        {{ medium.linked_orderposition.order.code }}</a>-{{ medium.linked_orderposition.positionid }}
-                                </span>
-                                {% endif %}
+                                        <span class="fa fa-ticket fa-fw"></span>
+                                        <a href="{% url "control:event.order" event=op.order.event.slug organizer=request.organizer.slug code=op.order.code %}">
+                                            {{ op.order.code }}</a>-{{ op.positionid }}
+                                    </span>
+                                {% endfor %}
                                 {% if medium.linked_giftcard %}
                                     <span class="helper-display-block">
                                     <span class="fa fa-credit-card fa-fw"></span>

src/pretix/control/views/organizer.py

@@ -3300,8 +3300,10 @@ class ReusableMediaListView(OrganizerDetailViewMixin, OrganizerPermissionRequire
 
     def get_queryset(self):
         qs = self.request.organizer.reusable_media.select_related(
-            'customer', 'linked_orderposition', 'linked_orderposition__order', 'linked_orderposition__order__event',
-            'linked_giftcard'
+            'customer',
+            'linked_giftcard',
+        ).prefetch_related(
+            Prefetch('linked_orderpositions', queryset=OrderPosition.objects.select_related("order", "order__event"))
         )
         if self.filter_form.is_valid():
             qs = self.filter_form.filter_qs(qs)
@@ -3349,10 +3351,14 @@ class ReusableMediumCreateView(OrganizerDetailViewMixin, OrganizerPermissionRequ
     @transaction.atomic
     def form_valid(self, form):
         r = super().form_valid(form)
-        form.instance.log_action('pretix.reusable_medium.created', user=self.request.user, data={
+
+        data = {
             k: getattr(form.instance, k)
             for k in form.changed_data
-        })
+        }
+        if "linked_orderpositions" in data:
+            data["linked_orderpositions"] = data["linked_orderpositions"].values_list("pk", flat=True)
+        form.instance.log_action('pretix.reusable_medium.created', user=self.request.user, data=data)
         messages.success(self.request, _('Your changes have been saved.'))
         return r
 
@@ -3378,10 +3384,13 @@ class ReusableMediumUpdateView(OrganizerDetailViewMixin, OrganizerPermissionRequ
     @transaction.atomic
     def form_valid(self, form):
         if form.has_changed():
-            self.object.log_action('pretix.reusable_medium.changed', user=self.request.user, data={
+            data = {
                 k: getattr(self.object, k)
                 for k in form.changed_data
-            })
+            }
+            if "linked_orderpositions" in data:
+                data["linked_orderpositions"] = data["linked_orderpositions"].values_list("pk", flat=True)
+            self.object.log_action('pretix.reusable_medium.changed', user=self.request.user, data=data)
         messages.success(self.request, _('Your changes have been saved.'))
         return super().form_valid(form)
 

src/tests/api/test_checkinrpc.py

@@ -286,12 +286,12 @@ def test_by_secret_special_chars(token_client, organizer, clist, event, order):
 @pytest.mark.django_db
 def test_by_medium(token_client, organizer, clist, event, order):
     with scopes_disabled():
-        ReusableMedium.objects.create(
+        rm = ReusableMedium.objects.create(
             type="barcode",
             identifier="abcdef",
             organizer=organizer,
-            linked_orderposition=order.positions.first(),
         )
+        rm.linked_orderpositions.add(order.positions.first())
     resp = _redeem(token_client, organizer, clist, "abcdef", {"source_type": "barcode"})
     assert resp.status_code == 201
     assert resp.data['status'] == 'ok'
@@ -301,6 +301,48 @@ def test_by_medium(token_client, organizer, clist, event, order):
     assert ci.raw_source_type == "barcode"
 
 
+@pytest.mark.django_db
+def test_by_medium_multiple_orderpositions(token_client, organizer, clist, event, order):
+    with scopes_disabled():
+        rm = ReusableMedium.objects.create(
+            type="barcode",
+            identifier="abcdef",
+            organizer=organizer,
+        )
+        rm.linked_orderpositions.add(order.positions.first())
+        op_item_other = order.positions.all()[1]
+        rm.linked_orderpositions.add(op_item_other)
+
+    # multiple tickets are valid => no check-in
+    resp = _redeem(token_client, organizer, clist, "abcdef", {"source_type": "barcode"})
+    assert resp.status_code == 400
+    assert resp.data['status'] == 'error'
+    assert resp.data['reason'] == 'ambiguous'
+
+    with scopes_disabled():
+        op_item_other.valid_from = datetime.datetime(2020, 1, 1, 12, 0, 0, tzinfo=event.timezone)
+        op_item_other.valid_until = datetime.datetime(2020, 1, 1, 15, 0, 0, tzinfo=event.timezone)
+        op_item_other.save()
+
+    with freeze_time("2020-01-01 13:45:00"):
+        # multiple tickets are valid => no check-in
+        resp = _redeem(token_client, organizer, clist, "abcdef", {"source_type": "barcode"})
+        assert resp.status_code == 400
+        assert resp.data['status'] == 'error'
+        assert resp.data['reason'] == 'ambiguous'
+
+    with freeze_time("2020-01-01 10:45:00"):
+        resp = _redeem(token_client, organizer, clist, "abcdef", {"source_type": "barcode"})
+        assert resp.status_code == 201
+        assert resp.data['status'] == 'ok'
+
+    with freeze_time("2020-01-01 15:45:00"):
+        resp = _redeem(token_client, organizer, clist, "abcdef", {"source_type": "barcode"})
+        assert resp.status_code == 400
+        assert resp.data['status'] == 'error'
+        assert resp.data['reason'] == 'already_redeemed'
+
+
 @pytest.mark.django_db
 def test_by_medium_not_connected(token_client, organizer, clist, event, order):
     with scopes_disabled():
@@ -318,12 +360,12 @@ def test_by_medium_not_connected(token_client, organizer, clist, event, order):
 @pytest.mark.django_db
 def test_by_medium_wrong_event(token_client, organizer, clist, event, order2):
     with scopes_disabled():
-        ReusableMedium.objects.create(
+        rm = ReusableMedium.objects.create(
             type="barcode",
             identifier="abcdef",
             organizer=organizer,
-            linked_orderposition=order2.positions.first(),
         )
+        rm.linked_orderpositions.add(order2.positions.first())
     resp = _redeem(token_client, organizer, clist, "abcdef", {"source_type": "barcode"})
     assert resp.status_code == 404
     assert resp.data['status'] == 'error'
@@ -337,12 +379,12 @@ def test_by_medium_wrong_event(token_client, organizer, clist, event, order2):
 @pytest.mark.django_db
 def test_by_medium_wrong_type(token_client, organizer, clist, event, order):
     with scopes_disabled():
-        ReusableMedium.objects.create(
+        rm = ReusableMedium.objects.create(
             type="nfc_uid",
             identifier="abcdef",
             organizer=organizer,
-            linked_orderposition=order.positions.first(),
         )
+        rm.linked_orderpositions.add(order.positions.first())
     resp = _redeem(token_client, organizer, clist, "abcdef", {"source_type": "barcode"})
     assert resp.status_code == 404
     assert resp.data['status'] == 'error'
@@ -355,13 +397,13 @@ def test_by_medium_wrong_type(token_client, organizer, clist, event, order):
 @pytest.mark.django_db
 def test_by_medium_inactive(token_client, organizer, clist, event, order):
     with scopes_disabled():
-        ReusableMedium.objects.create(
+        rm = ReusableMedium.objects.create(
             type="barcode",
             identifier="abcdef",
             organizer=organizer,
             active=False,
-            linked_orderposition=order.positions.first(),
         )
+        rm.linked_orderpositions.add(order.positions.first())
     resp = _redeem(token_client, organizer, clist, "abcdef", {"source_type": "barcode"})
     assert resp.status_code == 404
     assert resp.data['status'] == 'error'

src/tests/api/test_order_create.py

@@ -3086,9 +3086,78 @@ def test_order_create_use_medium(token_client, organizer, event, item, quota, qu
     with scopes_disabled():
         o = Order.objects.get(code=resp.data['code'])
         medium.refresh_from_db()
-        assert o.positions.first() == medium.linked_orderposition
+        assert o.positions.first() == medium.linked_orderpositions.first()
         assert resp.data['positions'][0]['pdf_data']['medium_identifier'] == medium.identifier
 
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/?pdf_data=true'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 201
+    with scopes_disabled():
+        o = Order.objects.get(code=resp.data['code'])
+        medium.refresh_from_db()
+        assert medium.linked_orderpositions.count() == 1
+        assert o.positions.first() == medium.linked_orderpositions.first()
+        assert resp.data['positions'][0]['pdf_data']['medium_identifier'] == medium.identifier
+
+
+@pytest.mark.django_db
+def test_order_create_add_to_medium(token_client, organizer, event, item, quota, question, medium):
+    item.media_type = medium.type
+    item.media_policy = Item.MEDIA_POLICY_REUSE_OR_NEW
+    item.save()
+    res = copy.deepcopy(ORDER_CREATE_PAYLOAD)
+    res['positions'][0]['item'] = item.pk
+    res['positions'][0]['use_reusable_medium'] = medium.pk
+    res['positions'][0]['add_to_reusable_medium'] = medium.pk
+    res['positions'][0]['answers'][0]['question'] = question.pk
+
+    # do not use use_reusable_medium and add_to_reusable_medium
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/?pdf_data=true'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 400
+
+    del res['positions'][0]['use_reusable_medium']
+
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/?pdf_data=true'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 201
+    with scopes_disabled():
+        medium.refresh_from_db()
+        assert medium.linked_orderpositions.count() == 1
+
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/?pdf_data=true'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 201
+    with scopes_disabled():
+        medium.refresh_from_db()
+        assert medium.linked_orderpositions.count() == 2
+
+    res['positions'][0]['use_reusable_medium'] = medium.pk
+    del res['positions'][0]['add_to_reusable_medium']
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/?pdf_data=true'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 201
+    with scopes_disabled():
+        o = Order.objects.get(code=resp.data['code'])
+        medium.refresh_from_db()
+        assert medium.linked_orderpositions.count() == 1
+        assert o.positions.first() == medium.linked_orderpositions.first()
+
 
 @pytest.mark.django_db
 def test_order_create_use_medium_other_organizer(token_client, organizer, event, item, quota, question, medium2):
@@ -3133,7 +3202,7 @@ def test_order_create_create_medium(token_client, organizer, event, item, quota,
         i = resp.data['positions'][0]['pdf_data']['medium_identifier']
         assert i
         m = organizer.reusable_media.get(identifier=i)
-        assert m.linked_orderposition == o.positions.first()
+        assert m.linked_orderpositions.first() == o.positions.first()
         assert m.type == "barcode"
 
 

src/tests/api/test_reusable_media.py

@@ -89,10 +89,13 @@ TEST_MEDIUM_RES = {
     "organizer": "dummy",
     "identifier": "ABCDEFGH",
     "type": "barcode",
+    "claim_token": None,
+    "label": None,
     "active": True,
     "expires": None,
     "customer": None,
     "linked_orderposition": None,
+    "linked_orderpositions": [],
     "linked_giftcard": None,
     "notes": None,
     "info": {},
@@ -138,7 +141,7 @@ def test_medium_detail(token_client, organizer, event, medium, giftcard, custome
         ticket = event.items.create(name='Early-bird ticket', category=None, default_price=23, admission=True,
                                     personalized=True)
         op = o.positions.create(item=ticket, price=Decimal("14"))
-        medium.linked_orderposition = op
+        medium.linked_orderpositions.add(op)
         medium.linked_giftcard = giftcard
         medium.customer = customer
         medium.save()
@@ -419,7 +422,7 @@ def test_medium_lookup_cross_organizer(token_client, organizer, organizer2, org2
         ticket = org2_event.items.create(name='Early-bird ticket', category=None, default_price=23, admission=True,
                                          personalized=True)
         op = o.positions.create(item=ticket, price=Decimal("14"))
-        medium2.linked_orderposition = op
+        medium2.linked_orderpositions.add(op)
         medium2.linked_giftcard = giftcard2
         medium2.save()