Source of file TestimonialWidget.php

<?php

class TestimonialWidget extends Widget

{

    private static $title = "Testimonial";

    private static $cmsTitle = "Testimonial";

    private static $description = "Displays a random testimonial from the database";

    private static $has_one = array(

        'Page' => 'TestimonialsHolderPage'

    );

    protected $testimonial;

    public function getTestimonial()

    {

        if (!$this->testimonial) {

            $this->testimonial = Testimonial::get()->sort("RAND()")->first();

        }

        return $this->testimonial;

    }

    public function getCMSFields()

    {

        $fields = parent::getCMSFields();

        $fields->push(

            DropdownField::create("PageID", "Testimonials Holder Page",

                TestimonialsHolderPage::get()->map()->toArray()

            )->setHasEmptyDefault(true)

        );

        return $fields;

    }

}