Show paid tickets instead of available quota in event list

src/pretix/base/migrations/0081_quota_cached_availability_paid_orders.py

@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.5 on 2017-10-18 09:06
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+def clear_quota_caches(app, schema_editor):
+    Quota = app.get_model('pretixbase', 'Quota')
+    Quota.objects.all().update(cached_availability_time=None)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0080_auto_20171016_1553'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='quota',
+            name='cached_availability_paid_orders',
+            field=models.PositiveIntegerField(blank=True, null=True),
+        ),
+        migrations.RunPython(
+            clear_quota_caches, migrations.RunPython.noop
+        )
+    ]

src/pretix/base/models/items.py

@@ -727,6 +727,7 @@ class Quota(LoggedModel):
     )
     cached_availability_state = models.PositiveIntegerField(null=True, blank=True)
     cached_availability_number = models.PositiveIntegerField(null=True, blank=True)
+    cached_availability_paid_orders = models.PositiveIntegerField(null=True, blank=True)
     cached_availability_time = models.DateTimeField(null=True, blank=True)
 
     class Meta:
@@ -783,8 +784,13 @@ class Quota(LoggedModel):
             self.cached_availability_state = res[0]
             self.cached_availability_number = res[1]
             self.cached_availability_time = now_dt
+            if self.size is None:
+                self.cached_availability_paid_orders = self.count_pending_orders()
             self.save(
-                update_fields=['cached_availability_state', 'cached_availability_number', 'cached_availability_time'],
+                update_fields=[
+                    'cached_availability_state', 'cached_availability_number', 'cached_availability_time',
+                    'cached_availability_paid_orders'
+                ],
                 clear_cache=False
             )
 
@@ -799,8 +805,9 @@ class Quota(LoggedModel):
         if size_left is None:
             return Quota.AVAILABILITY_OK, None
 
-        # TODO: Test for interference with old versions of Item-Quota-relations, etc.
-        size_left -= self.count_paid_orders()
+        paid_orders = self.count_paid_orders()
+        self.cached_availability_paid_orders = paid_orders
+        size_left -= paid_orders
         if size_left <= 0:
             return Quota.AVAILABILITY_GONE, 0
 

src/pretix/base/services/quotas.py

@@ -10,11 +10,11 @@ from ..signals import periodic_task
 
 @receiver(signal=periodic_task)
 def build_all_quota_caches(sender, **kwargs):
-    refresh_quota_cashes.apply_async()
+    refresh_quota_caches.apply_async()
 
 
 @app.task
-def refresh_quota_cashes():
+def refresh_quota_caches():
     last_activity = LogEntry.objects.filter(
         event=OuterRef('event_id'),
     ).order_by().values('event').annotate(