Update model

chat/migrations/0003_alter_message_parent.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.1.1 on 2023-12-13 13:02
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('chat', '0002_message_parent'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='message',
+            name='parent',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='chat.message'),
+        ),
+    ]

chat/models.py

@@ -19,7 +19,7 @@ class Message(models.Model):
     date = models.DateTimeField("date published")
     user = models.ForeignKey(User, on_delete=models.CASCADE)
     room = models.ForeignKey(Room, on_delete=models.CASCADE)
-    parent = models.ForeignKey('self', null=True, on_delete=models.SET_NULL)
+    parent = models.ForeignKey('self', blank=True, null=True, on_delete=models.SET_NULL)
 
     def __str__(self):
         return self.text