Mazaná galerie by neměla mít žádné podgalerie (jinak mohou přestat být doklikatelné)

galerie/migrations/0015_alter_galerie_galerie_up.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.2.16 on 2025-04-30 18:53
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('galerie', '0014_alter_galerie_zobrazit'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='galerie',
+            name='galerie_up',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='galerie.galerie'),
+        ),
+    ]

galerie/models.py

@@ -90,7 +90,7 @@ class Galerie(models.Model):
 	titulni_obrazek = models.ForeignKey(Obrazek, blank = True, null = True, related_name = "+", on_delete = models.SET_NULL)
 	zobrazit = models.IntegerField('Zobrazit?', default = ORG, choices = VIDITELNOST)
 	galerie_up = models.ForeignKey('Galerie', blank = True, null = True,
-		on_delete=models.SET_NULL)
+		on_delete=models.PROTECT)
 	soustredeni = models.ForeignKey(Soustredeni, blank = True, null = True,
 		on_delete=models.PROTECT)
 	poradi = models.IntegerField('Pořadí', blank = True, null = False, default = 0)