Refs #131 -- Basic implementation of invoicing

src/pretix/base/migrations/0012_auto_20160312_1040.py

@@ -0,0 +1,50 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-03-12 10:40
+from __future__ import unicode_literals
+
+import datetime
+from decimal import Decimal
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.invoices
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0011_auto_20160311_2052'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Invoice',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('invoice_no', models.PositiveIntegerField(db_index=True)),
+                ('is_cancelled', models.BooleanField(default=False)),
+                ('invoice_from', models.TextField()),
+                ('invoice_to', models.TextField()),
+                ('date', models.DateField(default=datetime.date.today)),
+                ('file', models.FileField(blank=True, null=True, upload_to=pretix.base.models.invoices.invoice_filename)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='invoices', to='pretixbase.Event')),
+                ('order', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='invoices', to='pretixbase.Order')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='InvoiceLine',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('description', models.TextField()),
+                ('gross_value', models.DecimalField(decimal_places=2, max_digits=10)),
+                ('tax_value', models.DecimalField(decimal_places=2, default=Decimal('0.00'), max_digits=10)),
+                ('tax_rate', models.DecimalField(decimal_places=2, default=Decimal('0.00'), max_digits=7)),
+                ('invoice', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='lines', to='pretixbase.Invoice')),
+            ],
+        ),
+        migrations.AlterUniqueTogether(
+            name='invoice',
+            unique_together=set([('event', 'invoice_no')]),
+        ),
+    ]

src/pretix/base/migrations/0013_invoice_locale.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-03-12 10:51
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0012_auto_20160312_1040'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invoice',
+            name='locale',
+            field=models.CharField(default='en', max_length=50),
+        ),
+    ]

src/pretix/base/migrations/0014_invoice_additional_text.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-03-12 11:07
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0013_invoice_locale'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invoice',
+            name='additional_text',
+            field=models.TextField(blank=True),
+        ),
+    ]

src/pretix/base/migrations/0015_auto_20160312_1924.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-03-12 19:24
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0014_invoice_additional_text'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='invoice',
+            name='is_cancelled',
+        ),
+        migrations.AddField(
+            model_name='invoice',
+            name='is_cancellation',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='invoice',
+            name='refers',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='refered', to='pretixbase.Invoice'),
+        ),
+    ]