From 7c490b46c8c5cb298c75f249724c9c8b179da58a Mon Sep 17 00:00:00 2001
From: Jake Moshenko <jake.moshenko@coreos.com>
Date: Mon, 5 Dec 2016 18:05:18 -0500
Subject: [PATCH] Only save dirty fields on Queue queries.

---
 data/database.py | 5 +++++
 data/queue.py    | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/data/database.py b/data/database.py
index afc1573b4..c5c7af0d8 100644
--- a/data/database.py
+++ b/data/database.py
@@ -758,6 +758,11 @@ class QueueItem(BaseModel):
   processing_expires = DateTimeField(null=True, index=True)
   retries_remaining = IntegerField(default=5, index=True)
 
+  class Meta:
+    database = db
+    read_slaves = (read_slave,)
+    only_save_dirty = True
+
 
 class RepositoryBuild(BaseModel):
   uuid = CharField(default=uuid_generator, index=True)
diff --git a/data/queue.py b/data/queue.py
index 421d7d6e7..0f9865d29 100644
--- a/data/queue.py
+++ b/data/queue.py
@@ -270,7 +270,7 @@ class WorkQueue(object):
           queue_item.processing_expires = new_expiration
           has_change = True
 
-        if updated_data is not None:
+        if updated_data is not None and queue_item.body != updated_data:
           queue_item.body = updated_data
           has_change = True