From e55f9e9fad0f08bcf0f0ba8e9368e4c6853bc1c8 Mon Sep 17 00:00:00 2001
From: Taylor Otwell <taylorotwell@gmail.com>
Date: Fri, 18 Nov 2011 14:50:11 -0600
Subject: [PATCH] Added a helpful comment regarding expressions.

---
 laravel/database/connection.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/laravel/database/connection.php b/laravel/database/connection.php
index 76f9ae54..e0022e3b 100644
--- a/laravel/database/connection.php
+++ b/laravel/database/connection.php
@@ -142,6 +142,9 @@ public function first($sql, $bindings = array())
 	 */
 	public function query($sql, $bindings = array())
 	{
+		// Since expressions are injected into the query as raw strings, we need
+		// to remove them from the array of bindings. They are not truly bound
+		// to the PDO statement as named parameters.
 		foreach ($bindings as $key => $value)
 		{
 			if ($value instanceof Expression) unset($bindings[$key]);