From 6ac36e84364cf5e74f14741a47ab676e97af17fe Mon Sep 17 00:00:00 2001
From: Sergey Krashevich <svk@svk.su>
Date: Fri, 14 Jul 2023 14:30:47 +0300
Subject: [PATCH] Fix: Add limit to event query (#7108)

* Add limit to event query for fetching latest event with specified label and camera name

* Refactor the label_thumbnail function in frigate/http.py to simplify the event_query logic and improve code readability
---
 frigate/http.py | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/frigate/http.py b/frigate/http.py
index f3e65381f..7859605e6 100644
--- a/frigate/http.py
+++ b/frigate/http.py
@@ -593,24 +593,14 @@ def timeline():
 @bp.route("/<camera_name>/<label>/thumbnail.jpg")
 def label_thumbnail(camera_name, label):
     label = unquote(label)
-    if label == "any":
-        event_query = (
-            Event.select()
-            .where(Event.camera == camera_name)
-            .order_by(Event.start_time.desc())
-        )
-    else:
-        event_query = (
-            Event.select()
-            .where(Event.camera == camera_name)
-            .where(Event.label == label)
-            .order_by(Event.start_time.desc())
-        )
+    event_query = Event.select(fn.MAX(Event.id)).where(Event.camera == camera_name)
+    if label != "any":
+        event_query = event_query.where(Event.label == label)
 
     try:
-        event = event_query.get()
+        event = event_query.scalar()
 
-        return event_thumbnail(event.id, 60)
+        return event_thumbnail(event, 60)
     except DoesNotExist:
         frame = np.zeros((175, 175, 3), np.uint8)
         ret, jpg = cv2.imencode(".jpg", frame, [int(cv2.IMWRITE_JPEG_QUALITY), 70])