[WEB-4823] chore: Add compound indexing for notification fields to improve query performance

apps/api/plane/db/migrations/0103_alter_notification_entity_identifier_and_more.py

@@ -0,0 +1,32 @@
+# Generated by Django 4.2.22 on 2025-09-01 12:34
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('db', '0102_page_sort_order_pagelog_entity_type_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='notification',
+            name='entity_identifier',
+            field=models.UUIDField(db_index=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='notification',
+            name='entity_name',
+            field=models.CharField(db_index=True, max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='notification',
+            name='read_at',
+            field=models.DateTimeField(db_index=True, null=True),
+        ),
+        migrations.AddIndex(
+            model_name='notification',
+            index=models.Index(fields=['receiver', 'read_at'], name='receiver_read_at_idx'),
+        ),
+    ]

apps/api/plane/db/models/notification.py

@@ -14,8 +14,8 @@ class Notification(BaseModel):
         "db.Project", related_name="notifications", on_delete=models.CASCADE, null=True
     )
     data = models.JSONField(null=True)
-    entity_identifier = models.UUIDField(null=True)
-    entity_name = models.CharField(max_length=255)
+    entity_identifier = models.UUIDField(null=True, db_index=True)
+    entity_name = models.CharField(max_length=255, db_index=True)
     title = models.TextField()
     message = models.JSONField(null=True)
     message_html = models.TextField(blank=True, default="<p></p>")
@@ -30,7 +30,7 @@ class Notification(BaseModel):
     receiver = models.ForeignKey(
         "db.User", related_name="received_notifications", on_delete=models.CASCADE
     )
-    read_at = models.DateTimeField(null=True)
+    read_at = models.DateTimeField(null=True, db_index=True)
     snoozed_till = models.DateTimeField(null=True)
     archived_at = models.DateTimeField(null=True)
 
@@ -39,6 +39,9 @@ class Meta:
         verbose_name_plural = "Notifications"
         db_table = "notifications"
         ordering = ("-created_at",)
+        indexes = [
+            models.Index(fields=["receiver", "read_at"], name="receiver_read_at_idx"),
+        ]
 
     def __str__(self):
         """Return name of the notifications"""