Replace unique_together with UniqueConstraint on OrderLine

bbs/migrations/0004_orderline_unique_constraint.py

@@ -0,0 +1,20 @@
+# Generated by Django 5.2.18 on 2026-10-22 23:51
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("bbs", "0003_alter_order_order_sum"),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name="orderline",
+            unique_together=set(),
+        ),
+        migrations.AddConstraint(
+            model_name="orderline",
+            constraint=models.UniqueConstraint(fields=("order", "product"), name="unique_order_product"),
+        ),
+    ]

bbs/models.py

@@ -171,7 +171,9 @@ class OrderLine(models.Model):
         return f"{self.amount} {self.product} ({self.unit_price} kr per)"
 
     class Meta:  # noqa: DJ012
-        unique_together = ("order", "product")
+        constraints = [
+            models.UniqueConstraint(fields=["order", "product"], name="unique_order_product"),
+        ]
 
 
 class Transaction(models.Model):