Add setting determining invoice number format (#193)

src/pretix/base/migrations/0028_invoice_invoice_no_charfield.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.8 on 2016-08-16 06:36
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0028_auto_20160816_1242'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invoice',
+            name='invoice_no_charfield',
+            field=models.CharField(db_index=True, default='', max_length=19),
+            preserve_default=False,
+        ),
+    ]

src/pretix/base/migrations/0029_invoice_no_data.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.8 on 2016-08-16 06:37
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+def forwards(apps, schema_editor):
+    Invoice = apps.get_model('pretixbase', 'Invoice')
+    for invoice in Invoice.objects.all():
+        invoice.invoice_no_charfield = '{:05d}'.format(invoice.invoice_no)
+        invoice.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0028_invoice_invoice_no_charfield'),
+    ]
+
+    operations = [
+        migrations.RunPython(forwards, migrations.RunPython.noop),
+    ]

src/pretix/base/migrations/0030_auto_20160816_0646.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.8 on 2016-08-16 06:46
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0029_invoice_no_data'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='invoice',
+            unique_together=set([('event', 'invoice_no_charfield')]),
+        ),
+        migrations.RemoveField(
+            model_name='invoice',
+            name='invoice_no',
+        ),
+    ]

src/pretix/base/migrations/0031_auto_20160816_0648.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.8 on 2016-08-16 06:48
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0030_auto_20160816_0646'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='invoice',
+            old_name='invoice_no_charfield',
+            new_name='invoice_no',
+        ),
+        migrations.AlterUniqueTogether(
+            name='invoice',
+            unique_together=set([('event', 'invoice_no')]),
+        ),
+    ]