fixed backend python error

backend/api/management/commands/sync_flavors.py

@@ -126,9 +126,7 @@ class Command(BaseCommand):
                 flavor = Flavor.objects.filter(name=title, category=category, is_legacy=False).first()
             
             if not flavor:
-                # One last check: if name exists in DIFFERENT category, we still create a new one
-                # If name exists in SAME category, we would have found it above.
-                flavor = Flavor(external_id=p['id'], name=title, is_legacy=False)
+                flavor = Flavor(external_id=p['id'], name=title, category=category, is_legacy=False)
                 created_count += 1
             else:
                 updated_count += 1

backend/api/migrations/0011_alter_flavor_name_and_more.py

@@ -0,0 +1,22 @@
+# Generated by Django 6.0.2 on 2026-02-16 18:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0010_user_avatar'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='flavor',
+            name='name',
+            field=models.CharField(max_length=100),
+        ),
+        migrations.AddConstraint(
+            model_name='flavor',
+            constraint=models.UniqueConstraint(fields=('name', 'category'), name='unique_flavor_name_per_category'),
+        ),
+    ]

backend/api/models.py

@@ -54,7 +54,7 @@ class Category(models.Model):
 
 class Flavor(models.Model):
     category = models.ForeignKey(Category, related_name='flavors', on_delete=models.CASCADE)
-    name = models.CharField(max_length=100, unique=True)
+    name = models.CharField(max_length=100) # Removed unique=True here
     description = models.TextField(blank=True)
     image_url = models.URLField(max_length=1000, blank=True, null=True)
     image = models.ImageField(upload_to='flavors/', blank=True, null=True)
@@ -64,8 +64,14 @@ class Flavor(models.Model):
     external_id = models.BigIntegerField(unique=True, null=True, blank=True)
     created_at = models.DateTimeField(auto_now_add=True)
 
+    class Meta:
+        # This allows "Erdbeere" in Iced Tea and "Erdbeere" in Milkshake
+        constraints = [
+            models.UniqueConstraint(fields=['name', 'category'], name='unique_flavor_name_per_category')
+        ]
+
     def __str__(self):
-        return self.name
+        return f"{self.name} ({self.category.name})"
 
     @property
     def get_average_rating(self):