From 432cc44a303083e57c8ba9634a20293449a3ef19 Mon Sep 17 00:00:00 2001
From: Ingo Schommer <ingo@silverstripe.com>
Date: Tue, 15 Jan 2013 00:43:43 +0100
Subject: [PATCH] Added many-many (plus extrafields) example

---
 code/Company.php  | 12 ++++++++++++
 code/Employee.php | 19 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/code/Company.php b/code/Company.php
index f160501..d5dcd20 100644
--- a/code/Company.php
+++ b/code/Company.php
@@ -22,6 +22,18 @@ class Company extends DataObject {
 		'Employees' => 'Employee'
 	);
 
+	public static $many_many  = array(
+		'PastEmployees' => 'Employee'
+	);
+
+	public static $many_many_extraFields = array(
+		'PastEmployees' => array(
+			'YearStart' => 'Int',
+			'YearEnd' => 'Int',
+			'Role' => 'Text',
+		)
+	);
+
 	static $belongs_many_many = array(
 		'RelationFieldsTestPages' => 'RelationFieldsTestPage',
 		'GridFieldTestPage' => 'GridFieldTestPage'
diff --git a/code/Employee.php b/code/Employee.php
index d7232ef..83bad43 100644
--- a/code/Employee.php
+++ b/code/Employee.php
@@ -15,6 +15,25 @@ class Employee extends DataObject {
 		'Company' => 'Company',
 		'ProfileImage' => 'Image'
 	);
+
+	public static $belongs_many_many  = array(
+		'PastCompanies' => 'Company'
+	);
+
+	function getCMSFields() {
+		$fields = parent::getCMSFields();
+
+		if(method_exists('ManyManyList', 'getExtraFields')) {
+			$fields->addFieldToTab('Root.Main', 
+				new NumericField('ManyMany[YearStart]', 'Year started (3.1, many-many only)')
+			);
+			$fields->addFieldToTab('Root.Main', 
+				new TextField('ManyMany[Role]', 'Role (3.1, many-many only)')
+			);	
+		}
+
+		return $fields;
+	}
 	
 	public function requireDefaultRecords() {
 		parent::requireDefaultRecords();