Improve visual transaction table

src/pretix/base/models/orders.py

@@ -2515,6 +2515,14 @@ class Transaction(models.Model):
                     obj.tax_rule_id, obj.tax_value, obj.fee_type, obj.internal_type)
         raise ValueError('invalid state')  # noqa
 
+    @property
+    def full_price(self):
+        return self.price * self.count
+
+    @property
+    def full_tax_value(self):
+        return self.tax_value * self.count
+
 
 class CartPosition(AbstractPosition):
     """

src/pretix/control/templates/pretixcontrol/order/transactions.html

@@ -18,10 +18,11 @@
         <tr>
             <th>{% trans "Date" %}</th>
             <th>{% trans "Product" %}</th>
-            <th class="text-right flip">{% trans "Quantity" %}</th>
             <th class="text-right flip">{% trans "Tax rate" %}</th>
-            <th class="text-right flip">{% trans "Tax value" %}</th>
+            <th class="text-right flip">{% trans "Quantity" %}</th>
-            <th class="text-right flip">{% trans "Price" %}</th>
+            <th class="text-right flip">{% trans "Single price" %}</th>
+            <th class="text-right flip">{% trans "Total tax value" %}</th>
+            <th class="text-right flip">{% trans "Total price" %}</th>
         </tr>
         </thead>
         <tbody>
@@ -50,12 +51,31 @@
                         <br>{{ t.subevent }}
                     {% endif %}
                 </td>
-                <td class="text-right flip">{{ t.count }} &times;</td>
                 <td class="text-right flip">{{ t.tax_rate }} %</td>
-                <td class="text-right flip">{{ t.tax_value|money:request.event.currency }}</td>
+                <td class="text-right flip">{{ t.count }} &times;</td>
                 <td class="text-right flip">{{ t.price|money:request.event.currency }}</td>
+                <td class="text-right flip">{{ t.full_tax_value|money:request.event.currency }}</td>
+                <td class="text-right flip">{{ t.full_price|money:request.event.currency }}</td>
             </tr>
         {% endfor %}
         </tbody>
+    <tfoot>
+    <tr class="{% if t.count < 0 %}text-danger{% endif %}">
+        <td>
+            <strong>{% trans "Sum" %}</strong>
+        </td>
+        <td>
+        </td>
+        <td></td>
+        <td class="text-right flip">
+            <strong>
+                {{ sums.count }}
+            </strong>
+        </td>
+        <td></td>
+        <td class="text-right flip"><strong>{{ sums.full_tax_value|money:request.event.currency }}</strong></td>
+        <td class="text-right flip"><strong>{{ sums.full_price|money:request.event.currency }}</strong></td>
+    </tr>
+    </tfoot>
     </table>
 {% endblock %}

src/pretix/control/views/orders.py

@@ -50,7 +50,7 @@ from django.core.exceptions import ValidationError
 from django.core.files import File
 from django.db import transaction
 from django.db.models import (
-    Count, Exists, IntegerField, OuterRef, Prefetch, ProtectedError, Q,
+    Count, Exists, F, IntegerField, OuterRef, Prefetch, ProtectedError, Q,
     Subquery, Sum,
 )
 from django.forms import formset_factory
@@ -410,6 +410,11 @@ class OrderTransactions(OrderView):
         ctx['transactions'] = self.order.transactions.select_related(
             'item', 'variation', 'subevent'
         ).order_by('datetime')
+        ctx['sums'] = self.order.transactions.aggregate(
+            count=Sum('count'),
+            full_price=Sum(F('count') * F('price')),
+            full_tax_value=Sum(F('count') * F('tax_value')),
+        )
         return ctx