Add QR codes for pseudonymization ID

src/pretix/base/migrations/0093_auto_20180528_1432.py

@@ -0,0 +1,45 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.13 on 2018-05-28 14:32
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+from django.utils.crypto import get_random_string
+
+
+def set_pids(apps, schema_editor):
+    OrderPosition = apps.get_model('pretixbase', 'OrderPosition')  # noqa
+    taken = set()
+    charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ3789')
+    for op in OrderPosition.objects.iterator():
+        while True:
+            code = get_random_string(length=10, allowed_chars=charset)
+            if code not in taken:
+                op.pseudonymization_id = code
+                taken.add(code)
+                break
+        op.save(update_fields=['pseudonymization_id'])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0092_auto_20180511_1224'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='orderposition',
+            name='pseudonymization_id',
+            field=models.CharField(db_index=True, max_length=16, null=True, unique=True),
+        ),
+        migrations.RunPython(
+            set_pids,
+            migrations.RunPython.noop,
+        ),
+        migrations.AlterField(
+            model_name='orderposition',
+            name='pseudonymization_id',
+            field=models.CharField(db_index=True, default='', max_length=16, unique=True),
+            preserve_default=False,
+        ),
+    ]