Allow to add a text to gift card transactions

src/pretix/base/migrations/0146_giftcardtransaction_text.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.4 on 2020-03-02 11:28
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0145_auto_20200210_1038'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='giftcardtransaction',
+            name='text',
+            field=models.TextField(null=True),
+        ),
+    ]

src/pretix/base/models/giftcards.py

@@ -119,6 +119,7 @@ class GiftCardTransaction(models.Model):
         blank=True,
         on_delete=models.PROTECT
     )
+    text = models.TextField(blank=True, null=True)
 
     class Meta:
         ordering = ("datetime",)