Add new fields to invoice model and API

src/pretix/base/migrations/0178_auto_20210308_1326.py

@@ -0,0 +1,34 @@
+# Generated by Django 3.0.12 on 2021-03-08 13:26
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0177_auto_20210301_1510'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invoiceline',
+            name='attendee_name',
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name='invoiceline',
+            name='event_date_to',
+            field=models.DateTimeField(null=True),
+        ),
+        migrations.AddField(
+            model_name='invoiceline',
+            name='item',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Item'),
+        ),
+        migrations.AddField(
+            model_name='invoiceline',
+            name='variation',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.ItemVariation'),
+        ),
+    ]