Show issued gift card in order view

src/pretix/presale/templates/pretixpresale/event/fragment_cart.html

@@ -33,7 +33,14 @@
                 {% endif %}
             {% endif %}
 
-
+            {% if line.issued_gift_cards %}
+                <dl>
+                    {% for gc in line.issued_gift_cards.all %}
+                        <dt>{% trans "Gift card code" %}</dt>
+                        <dd>{{ gc.secret }}</dd>
+                    {% endfor %}
+                </dl>
+            {% endif %}
             {% if line.has_questions %}
                 <dl>
                     {% if line.item.admission and event.settings.attendee_names_asked %}

src/pretix/presale/views/order.py

@@ -163,7 +163,7 @@ class OrderDetails(EventViewMixin, OrderDetailMixin, CartMixin, TicketPageMixin,
         ctx = super().get_context_data(**kwargs)
         ctx['cart'] = self.get_cart(
             answers=True, downloads=ctx['can_download'],
-            queryset=self.order.positions.select_related('tax_rule'),
+            queryset=self.order.positions.prefetch_related('issued_gift_cards').select_related('tax_rule'),
             order=self.order
         )
         ctx['can_download_multi'] = any([b['multi'] for b in self.download_buttons]) and (