From fce37673898d33ed3a61e29ee9a8b5cd0383704c Mon Sep 17 00:00:00 2001
From: Sam Minnee <sam@silverstripe.com>
Date: Thu, 9 Oct 2008 00:32:10 +0000
Subject: [PATCH] API CHANGE: Added support for dot syntax to
 FieldSet::fieldByName()

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@63922 467b73ca-7a2a-4603-9d3b-597d59a354a9
---
 forms/FieldSet.php | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/forms/FieldSet.php b/forms/FieldSet.php
index e47b17f92..5b61e4b18 100755
--- a/forms/FieldSet.php
+++ b/forms/FieldSet.php
@@ -240,15 +240,30 @@ class FieldSet extends DataObjectSet {
 
 	/**
 	 * Returns a named field.
+	 * You can use dot syntax to get fields from child composite fields
 	 * 
 	 * @todo Implement similiarly to dataFieldByName() to support nested sets - or merge with dataFields()
 	 */
 	public function fieldByName($name) {
+		if(strpos($name,'.') !== false)	list($name, $remainder) = explode('.',$name,2);
+		else $remainder = null;
+		
 		foreach($this->items as $child) {
-			if($name == $child->Name() || $name == $child->id) return $child;
+			if($name == $child->Name() || $name == $child->id) {
+				if($remainder) {
+					if($child->isComposite()) {
+						return $child->fieldByName($remainder);
+					} else {
+						user_error("Trying to get field '$remainder' from non-composite field $child->class.$name", E_USER_WARNING);
+						return null;
+					}
+				} else {
+					return $child;
+				}
+			}
 		}
 	}
-
+	
 	/**
 	 * Returns a named field in a sequential set.
 	 * Use this if you're using nested FormFields.