Decouple CachedTicket from CachedFile

src/pretix/base/migrations/0051_auto_20161221_1720.py

@@ -0,0 +1,54 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.4 on 2016-12-21 17:20
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+import pretix.base.models.orders
+
+
+def invalidate_ticket_cache(apps, schema_editor):
+    CachedTicket = apps.get_model('pretixbase', 'CachedTicket')
+    for ct in CachedTicket.objects.all():
+        try:
+            if ct.cachedfile:
+                ct.cachedfile.delete()
+                if ct.cachedfile.file:
+                    ct.cachedfile.file.delete(False)
+        except models.Model.DoesNotExist:
+            pass
+        ct.delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0050_orderposition_positionid'),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            invalidate_ticket_cache, migrations.RunPython.noop
+        ),
+        migrations.RemoveField(
+            model_name='cachedticket',
+            name='cachedfile',
+        ),
+        migrations.AddField(
+            model_name='cachedticket',
+            name='extension',
+            field=models.CharField(default='', max_length=255),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='cachedticket',
+            name='file',
+            field=models.FileField(blank=True, null=True, upload_to=pretix.base.models.orders.cachedticket_name),
+        ),
+        migrations.AddField(
+            model_name='cachedticket',
+            name='type',
+            field=models.CharField(default='', max_length=255),
+            preserve_default=False,
+        ),
+    ]