setAppendToTop - Fatal error: Call to undefined method GridFieldSortableRows::create()

[claire-ee]

I am trying to add setAppendToTop to my sortable GridField. However as soon as I add the following

$config->addComponent(GridFieldSortableRows::create('SortOrder')->setAppendToTop(true));

when I access page in the CMS I am getting:

Fatal error: Call to undefined method GridFieldSortableRows::create()

Silverstripe Version 3.1.2
Full code:

class ProductsHolderPage extends Page
{

    private static $many_many = array(     
        'Products' => 'Product'
    );

    private static $many_many_extraFields=array(
        'Products'=>array(
            'SortOrder'=>'Int'
        )
    );

    public function Products() {
        return $this->getManyManyComponents('Products')->sort('SortOrder');
    }

    function getCMSFields()
    {
        $fields = parent::getCMSFields();

        $config = GridFieldConfig_RelationEditor::create(10);
        $config->getComponentByType('GridFieldAddExistingAutocompleter')->setSearchFields(array('Name'))->setResultsFormat('$Name'); 
        $config->addComponent(new GridFieldSortableRows('SortOrder'));


        $config->addComponent(GridFieldSortableRows::create('SortOrder')->setAppendToTop(true));

         $productsField = new GridField(
            'Products',
            'Product',
            $this->Products()
            ,$config
        );

        $fields->addFieldsToTab('Root.Products', array(
            $productsField
        ));


        return $fields;
    }  

}

Many thanks

[UndefinedOffset]

This is because GridFieldSortableRows like most GridField components do not extend the Object class, so create() doesn't exist. You will need to do something like this instead:

$sortableRows=new GridFieldSortableRows('SortOrder');
$config->addComponent($sortableRows->setAppendToTop(true));

Also you probably shouldn't add it to the same GridField twice not sure what that would cause.

[claire-ee]

Thank you, that worked perfectly.
Claire