Allow to manually revert check-ins on a check-in list

src/pretix/control/logdisplay.py

@@ -334,6 +334,20 @@ def pretixcontrol_logentry_display(sender: Event, logentry: LogEntry, **kwargs):
             list=checkin_list
         )
 
+    if logentry.action_type == 'pretix.control.views.checkin.reverted':
+        if 'list' in data:
+            try:
+                checkin_list = sender.checkin_lists.get(pk=data.get('list')).name
+            except CheckinList.DoesNotExist:
+                checkin_list = _("(unknown)")
+        else:
+            checkin_list = _("(unknown)")
+
+        return _('The check-in of position #{posid} on list "{list}" has been reverted.').format(
+            posid=data.get('positionid'),
+            list=checkin_list,
+        )
+
     if logentry.action_type == 'pretix.team.member.added':
         return _('{user} has been added to the team.').format(user=data.get('email'))
 

src/pretix/control/templates/pretixcontrol/checkin/index.html

@@ -120,6 +120,9 @@
                 <button type="submit" class="btn btn-primary btn-save">
                     {% trans "Check-In selected attendees" %}
                 </button>
+                <button type="submit" class="btn btn-default btn-save" name="revert" value="true">
+                    {% trans "Revert selected check-ins" %}
+                </button>
             {% endif %}
         </form>
         {% include "pretixcontrol/pagination.html" %}

src/pretix/control/views/checkin.py

@@ -90,21 +90,34 @@ class CheckInListShow(EventPermissionRequiredMixin, PaginationMixin, ListView):
             pk__in=request.POST.getlist('checkin')
         )
 
-        for op in positions:
-            created = False
-            if op.order.status == Order.STATUS_PAID or (self.list.include_pending and op.order.status == Order.STATUS_PENDING):
-                ci, created = Checkin.objects.get_or_create(position=op, list=self.list, defaults={
-                    'datetime': now(),
-                })
-            op.order.log_action('pretix.control.views.checkin', data={
-                'position': op.id,
-                'positionid': op.positionid,
-                'first': created,
-                'datetime': now(),
-                'list': self.list.pk
-            }, user=request.user)
+        if request.POST.get('revert') == 'true':
+            for op in positions:
+                if op.order.status == Order.STATUS_PAID or (self.list.include_pending and op.order.status == Order.STATUS_PENDING):
+                    Checkin.objects.filter(position=op, list=self.list).delete()
+                    op.order.log_action('pretix.control.views.checkin.reverted', data={
+                        'position': op.id,
+                        'positionid': op.positionid,
+                        'list': self.list.pk
+                    }, user=request.user)
+
+            messages.success(request, _('The selected check-ins have been reverted.'))
+        else:
+            for op in positions:
+                created = False
+                if op.order.status == Order.STATUS_PAID or (self.list.include_pending and op.order.status == Order.STATUS_PENDING):
+                    ci, created = Checkin.objects.get_or_create(position=op, list=self.list, defaults={
+                        'datetime': now(),
+                    })
+                    op.order.log_action('pretix.control.views.checkin', data={
+                        'position': op.id,
+                        'positionid': op.positionid,
+                        'first': created,
+                        'datetime': now(),
+                        'list': self.list.pk
+                    }, user=request.user)
+
+            messages.success(request, _('The selected tickets have been marked as checked in.'))
 
-        messages.success(request, _('The selected tickets have been marked as checked in.'))
         return redirect(reverse('control:event.orders.checkinlists.show', kwargs={
             'event': self.request.event.slug,
             'organizer': self.request.event.organizer.slug,

src/tests/control/test_checkins.py

@@ -266,6 +266,26 @@ def test_manual_checkins(client, checkin_list_env):
     ).exists()
 
 
+@pytest.mark.django_db
+def test_manual_checkins_revert(client, checkin_list_env):
+    client.login(email='dummy@dummy.dummy', password='dummy')
+    assert not checkin_list_env[5][3].checkins.exists()
+    client.post('/control/event/dummy/dummy/checkinlists/{}/'.format(checkin_list_env[6].pk), {
+        'checkin': [checkin_list_env[5][3].pk]
+    })
+    client.post('/control/event/dummy/dummy/checkinlists/{}/'.format(checkin_list_env[6].pk), {
+        'checkin': [checkin_list_env[5][3].pk],
+        'revert': 'true'
+    })
+    assert not checkin_list_env[5][3].checkins.exists()
+    assert LogEntry.objects.filter(
+        action_type='pretix.control.views.checkin', object_id=checkin_list_env[5][3].order.pk
+    ).exists()
+    assert LogEntry.objects.filter(
+        action_type='pretix.control.views.checkin.reverted', object_id=checkin_list_env[5][3].order.pk
+    ).exists()
+
+
 @pytest.fixture
 def checkin_list_with_addon_env():
     # permission