Added the option of unlimited quotas

src/pretix/base/migrations/0002_auto_20151021_1412.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='quota',
+            name='size',
+            field=models.PositiveIntegerField(help_text='Leave empty for an unlimited number of tickets.', verbose_name='Total capacity', blank=True, null=True),
+        ),
+    ]

src/pretix/base/models/items.py

@@ -1,4 +1,5 @@
 from itertools import product
+import sys
 
 from django.db import models
 from django.db.models import Q, Case, Count, Sum, When
@@ -315,7 +316,8 @@ class Item(Versionable):
         if self.properties.count() > 0:  # NOQA
             raise ValueError('Do not call this directly on items which have properties '
                              'but call this on their ItemVariation objects')
-        return min([q.availability() for q in self.quotas.all()])
+        return min([q.availability() for q in self.quotas.all()],
+                   key=lambda s: (s[0], s[1] if s[1] is not None else sys.maxsize))
 
     def check_restrictions(self):
         """
@@ -513,7 +515,8 @@ class ItemVariation(Versionable):
 
         :returns: any of the return codes of :py:meth:`Quota.availability()`.
         """
-        return min([q.availability() for q in self.quotas.all()])
+        return min([q.availability() for q in self.quotas.all()],
+                   key=lambda s: (s[0], s[1] if s[1] is not None else sys.maxsize))
 
     def to_variation_dict(self):
         """
@@ -769,7 +772,9 @@ class Quota(Versionable):
         verbose_name=_("Name")
     )
     size = models.PositiveIntegerField(
-        verbose_name=_("Total capacity")
+        verbose_name=_("Total capacity"),
+        null=True, blank=True,
+        help_text=_("Leave empty for an unlimited number of tickets.")
     )
     items = VersionedManyToManyField(
         Item,
@@ -810,6 +815,9 @@ class Quota(Versionable):
                   and the second is the number of available tickets.
         """
         size_left = self.size
+        if size_left is None:
+            return Quota.AVAILABILITY_OK, None
+
         # TODO: Test for interference with old versions of Item-Quota-relations, etc.
         # TODO: Prevent corner-cases like people having ordered an item before it got
         # its first variationsadde

src/pretix/base/models/orders.py

@@ -228,6 +228,7 @@ class Order(Versionable):
                     else:
                         # Use cached version
                         quota = quota_cache[quota.identity]
+                    if quota.cached_availability is not None:
                         quota.cached_availability -= 1
                         if quota.cached_availability < 0:
                             # This quota is sold out/currently unavailable, so do not sell this at all

src/pretix/base/services/cart.py

@@ -104,7 +104,7 @@ def _add_items(event, items, session, expiry):
         quota_ok = i[2]
         for quota in quotas:
             avail = quota.availability()
-            if avail[1] < i[2]:
+            if avail[1] is not None and avail[1] < i[2]:
                 # This quota is not available or less than i[2] items are left, so we have to
                 # reduce the number of bought items
                 if avail[0] != Quota.AVAILABILITY_OK:

src/pretix/control/templates/pretixcontrol/items/fragment_quota_availability.html

@@ -2,8 +2,12 @@
 {% if availability.0 == 10 %}
     <span class="label label-warning">{% trans "Sold out (pending orders)" %}</span>
 {% elif availability.0 == 100 %}
+    {% if availability.1 != None %}
         <span class="label label-success">{% blocktrans trimmed with num=availability.1 %}
             {{ num }} available{% endblocktrans %}</span>
+    {% else %}
+        <span class="label label-success">{% trans "Unlimited" %}</span>
+    {% endif %}
 {% elif availability.0 == 20 %}
     <span class="label label-warning">{% trans "Sold out (or reserved)" %}</span>
 {% elif availability.0 == 0 %}

src/tests/base/test_models.py

@@ -303,6 +303,19 @@ class QuotaTestCase(BaseQuotaTestCase):
         quota2.save()
         self.assertEqual(self.item1.check_quotas(), (Quota.AVAILABILITY_GONE, 0))
 
+    def test_unlimited(self):
+        self.quota.items.add(self.item1)
+        order = Order.objects.create(event=self.event, status=Order.STATUS_PAID,
+                                     expires=now() + timedelta(days=3),
+                                     total=2)
+        OrderPosition.objects.create(order=order, item=self.item1, price=2)
+        OrderPosition.objects.create(order=order, item=self.item1, price=2)
+        self.assertEqual(self.item1.check_quotas(), (Quota.AVAILABILITY_GONE, 0))
+
+        self.quota.size = None
+        self.quota.save()
+        self.assertEqual(self.item1.check_quotas(), (Quota.AVAILABILITY_OK, None))
+
 
 class OrderTestCase(BaseQuotaTestCase):
     def setUp(self):