Force uniqueness on uuid

nicohack202002/uncloud/opennebula/migrations/0003_auto_20200223_1058.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.3 on 2020-02-23 10:58
+
+from django.db import migrations, models
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('opennebula', '0002_vm_uuid'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='vm',
+            name='uuid',
+            field=models.UUIDField(default=uuid.uuid4, editable=False, unique=True),
+        ),
+    ]

nicohack202002/uncloud/opennebula/models.py

@@ -6,7 +6,7 @@ from django.contrib.postgres.fields import JSONField
 
 class VM(models.Model):
     vmid = models.IntegerField(primary_key=True)
-    uuid = models.UUIDField(default=uuid.uuid4, editable=False)
+    uuid = models.UUIDField(default=uuid.uuid4, editable=False, unique=True)
     owner = models.ForeignKey(get_user_model(), on_delete=models.CASCADE)
     data = JSONField()