Offer download options per position, not per order

src/pretix/base/migrations/0044_auto_20161101_1610.py

@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.2 on 2016-11-01 16:10
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+def forwards(apps, schema_editor):
+    CachedTicket = apps.get_model('pretixbase', 'CachedTicket')
+    CachedTicket.objects.all().delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0043_globalsetting'),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            forwards, migrations.RunPython.noop
+        ),
+        migrations.RemoveField(
+            model_name='cachedticket',
+            name='order',
+        ),
+        migrations.AddField(
+            model_name='cachedticket',
+            name='order_position',
+            field=models.ForeignKey(default=None, on_delete=django.db.models.deletion.CASCADE, to='pretixbase.OrderPosition'),
+            preserve_default=False,
+        ),
+    ]