fix: Resolve group by id max length issue (#36668)

Author: hassan-raza-1

openedx/core/djangoapps/notifications/migrations/0007_alter_notification_group_by_id.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.20 on 2025-05-06 13:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('notifications', '0006_notification_group_by_id'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='notification',
+            name='group_by_id',
+            field=models.CharField(db_index=True, default='', max_length=255),
+        ),
+    ]

openedx/core/djangoapps/notifications/models.py

@@ -111,7 +111,7 @@ class Notification(TimeStampedModel):
     email = models.BooleanField(default=False, null=False, blank=False)
     last_read = models.DateTimeField(null=True, blank=True)
     last_seen = models.DateTimeField(null=True, blank=True)
-    group_by_id = models.CharField(max_length=42, db_index=True, null=False, default="")
+    group_by_id = models.CharField(max_length=255, db_index=True, null=False, default="")
 
     def __str__(self):
         return f'{self.user.username} - {self.course_id} - {self.app_name} - {self.notification_type}'