silverstripe-framework/tests/php/ORM/DataExtensionTest/CMSFieldsGrandChild.php

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<?php
namespace SilverStripe\ORM\Tests\DataExtensionTest;
use SilverStripe\Dev\TestOnly;
use SilverStripe\Forms\FieldList;
use SilverStripe\Forms\TextField;
use SilverStripe\ORM\Tests\DataExtensionTest\CMSFieldsChild;
/**
* Third level test class, testing that beforeExtendingCMSFields can be nested
*/
class CMSFieldsGrandChild extends CMSFieldsChild implements TestOnly
{
private static $table_name = 'DataExtensionTest_CMSFieldsGrandChild';
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private static $db = array(
'GrandchildField' => 'Varchar(255)'
);
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public function getCMSFields()
{
$this->beforeUpdateCMSFields(
function (FieldList $fields) {
// Remove field from parent's beforeExtendingCMSFields
$fields->removeByName('ChildFieldBeforeExtension', true);
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// Adds own pre-extension field
$fields->addFieldToTab('Root.Test', new TextField('GrandchildFieldBeforeExtension'));
}
);
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$fields = parent::getCMSFields();
$fields->addFieldToTab('Root.Test', new TextField('GrandchildField'));
return $fields;
}
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}