Swap to better method of validating uniqueness of cable types

SCOPE, Arona, damn it

assets/forms.py

@@ -45,11 +45,3 @@ class CableTypeForm(forms.ModelForm):
     class Meta:
         model = models.CableType
         fields = '__all__'
-
-    def clean(self):  # TODO Does unique_together work better than this?
-        form_data = self.cleaned_data
-        queryset = models.CableType.objects.filter(Q(plug=form_data['plug']) & Q(socket=form_data['socket']) & Q(circuits=form_data['circuits']) & Q(cores=form_data['cores']))
-        # Being identical to itself shouldn't count...
-        if queryset.exists() and self.instance.pk != queryset[0].pk:
-            raise forms.ValidationError("A cable type that exactly matches this one already exists, please use that instead.", code="notunique")
-        return form_data

assets/migrations/0022_alter_cabletype_unique_together.py

@@ -0,0 +1,17 @@
+# Generated by Django 3.2.11 on 2022-01-12 19:11
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('assets', '0021_auto_20210302_1204'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='cabletype',
+            unique_together={('plug', 'socket', 'circuits', 'cores')},
+        ),
+    ]

assets/models.py

@@ -75,6 +75,7 @@ class CableType(models.Model):
 
     class Meta:
         ordering = ['plug', 'socket', '-circuits']
+        unique_together = ['plug', 'socket', 'circuits', 'cores']
 
     def __str__(self):
         if self.plug and self.socket: