feat: add data migration to make voucher names unique

ecommerce/extensions/voucher/migrations/0013_make_voucher_names_unique.py

@@ -0,0 +1,34 @@
+# Generated by Django 3.2.20 on 2023-11-14 11:20
+
+from django.core.paginator import Paginator
+from django.db import migrations
+
+
+def make_voucher_names_unique(apps, schema_editor):
+    """
+    Appends a number to voucher names.
+    """
+    Voucher = apps.get_model('voucher', 'Voucher')
+    vouchers = Voucher.objects.all()
+    paginator = Paginator(vouchers, 1000)
+
+    for page_number in paginator.page_range:
+        page = paginator.page(page_number)
+        updates = []
+
+        for obj in page.object_list:
+            obj.name = '%d - %s' % (obj.id, obj.name)
+            updates.append(obj)
+
+        Voucher.objects.bulk_update(updates, ['name'])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('voucher', '0012_voucher_is_public'),
+    ]
+
+    operations = [
+        migrations.RunPython(make_voucher_names_unique, migrations.RunPython.noop),
+    ]

ecommerce/extensions/voucher/migrations/0013_auto_20231108_1355.py → ecommerce/extensions/voucher/migrations/0014_auto_20231114_1156.py

@@ -1,12 +1,12 @@
-# Generated by Django 3.2.20 on 2023-11-08 13:55
+# Generated by Django 3.2.20 on 2023-11-14 11:56
 
 from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('voucher', '0012_voucher_is_public'),
+        ('voucher', '0013_make_voucher_names_unique'),
     ]
 
     operations = [