From 4d155c61ce8a037441ac72f58dfedd9182439d78 Mon Sep 17 00:00:00 2001
From: Tobie Morgan Hitchcock <tobie@abcum.com>
Date: Thu, 19 Apr 2018 13:33:04 +0100
Subject: [PATCH] Only run events when the document has changed

---
 db/define_test.go | 2 +-
 db/event.go       | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/db/define_test.go b/db/define_test.go
index 59b2cfea..08528e05 100644
--- a/db/define_test.go
+++ b/db/define_test.go
@@ -601,7 +601,7 @@ func TestDefine(t *testing.T) {
 		So(res[6].Result, ShouldHaveLength, 1)
 		So(res[7].Result, ShouldHaveLength, 1)
 		So(res[8].Result, ShouldHaveLength, 1)
-		So(res[9].Result, ShouldHaveLength, 4)
+		So(res[9].Result, ShouldHaveLength, 3)
 
 	})
 
diff --git a/db/event.go b/db/event.go
index c857679b..6e021a06 100644
--- a/db/event.go
+++ b/db/event.go
@@ -25,6 +25,14 @@ import (
 // table, and executes them in name order.
 func (d *document) event(ctx context.Context, met method) (err error) {
 
+	// If this document has not changed
+	// then there is no need to perform
+	// any registered events.
+
+	if ok := d.changed(); !ok {
+		return
+	}
+
 	// Get the event values specified
 	// for this table, loop through
 	// them, and compute the events.