silverstripe-framework/tests/php/Forms/UploadFieldTest/FileExtension.php

<?php

namespace SilverStripe\Forms\Tests\UploadFieldTest;

use SilverStripe\Dev\TestOnly;
use SilverStripe\ORM\DataExtension;

class FileExtension extends DataExtension implements TestOnly
{
    private static $has_one = array(
        'HasManyRecord' => TestRecord::class,
        'HasManyMaxTwoRecord' => TestRecord::class,
        'HasManyNoViewRecord' => TestRecord::class,
        'ReadonlyRecord' => TestRecord::class
    );

    private static $has_many = array(
        'HasOneRecords' => 'SilverStripe\Forms\Tests\UploadFieldTest\TestRecord.HasOneFile',
        'HasOneMaxOneRecords' => 'SilverStripe\Forms\Tests\UploadFieldTest\TestRecord.HasOneFileMaxOne',
        'HasOneMaxTwoRecords' => 'SilverStripe\Forms\Tests\UploadFieldTest\TestRecord.HasOneFileMaxTwo',
    );

    private static $belongs_many_many = array(
        'ManyManyRecords' => TestRecord::class
    );

    public function canDelete($member = null)
    {
        if ($this->owner->Name == 'nodelete.txt') {
            return false;
        }
    }

    public function canEdit($member = null)
    {
        if ($this->owner->Name == 'noedit.txt') {
            return false;
        }
    }

    public function canView($member = null)
    {
        if ($this->owner->Name == 'noview.txt') {
            return false;
        }
    }
}