<?php

class PghSponsors extends Page {

    private static $has_many = array(
            'Sponsors' => 'DoSponsor'
    );

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

        /* GRIDFIELD */
        $gridFieldConfig = GridFieldConfig_RelationEditor::create();
        $sponsorsField = new GridField(
                        'Sponsors', 'All Sponsors', $this->Sponsors(),  $gridFieldConfig
        );
        $fields->addFieldToTab('Root.Sponsors', $sponsorsField);

        return $fields;
    }
}