many_many Example ================= ```php /*** TestPage.php ***/ class TestPage extends Page { private static $many_many = array( 'TestObjects' => 'TestObject', ); private static $many_many_extraFields = array( 'TestObjects' => array( 'SortOrder' => 'Int', ) ); public function getCMSFields() { $fields = parent::getCMSFields(); $conf = GridFieldConfig_RelationEditor::create(10); $conf->addComponent(new GridFieldSortableRows('SortOrder')); $fields->addFieldToTab('Root.TestObjects', new GridField('TestObjects', 'TestObjects', $this->TestObjects(), $conf)); return $fields; } public function TestObjects() { return $this->getManyManyComponents('TestObjects')->sort('SortOrder'); } } /*** TestObject.php ***/ class TestObject extends DataObject { private static $db = array( 'Title' => 'Text', ); private static $belongs_many_many = array( 'TestPages' => 'TestPage', ); } ```