frontend: make dff shortname unique

fifoci/frontend/migrations/0003_alter_fifotest_shortname.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.5 on 2023-01-27 04:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("frontend", "0002_alter_version_hash"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="fifotest",
+            name="shortname",
+            field=models.CharField(db_index=True, max_length=32, unique=True),
+        ),
+    ]

fifoci/frontend/models.py

@@ -9,7 +9,7 @@ from django.urls import reverse
 class FifoTest(models.Model):
     file = models.FileField(upload_to="dff/", max_length=256)
     name = models.CharField(max_length=128)
-    shortname = models.CharField(max_length=32, db_index=True)
+    shortname = models.CharField(max_length=32, unique=True, db_index=True)
     active = models.BooleanField(default=True, db_index=True)
     description = models.TextField(blank=True)