sortablegridfield/docs/ManyManyExample.md

many_many Example

/*** 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',
	);
}