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InheritageBySiteTreeExtension.php
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InheritageBySiteTreeExtension.php
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<?php
/**
* This class does load the information from the parent page in the SiteTree.
*
* If you are keen to avoid extensions (to save resources) please see the end of this file for the method to copy into
* your Page.php
*/
class InheritageBySiteTreeExtension extends Extension
{
/**
* Does nothing else than just calling the parent, if exists, and returning $dbField or calling itself again.
*
* @throws Exception
* @param string $dbField
* @return null|string|DataList
*/
public function getFromParentPage($dbField)
{
if (!is_string($dbField)) {
throw new Exception('You can only give strings to getFromParentPage');
}
$result = null;
// if this isn't the top level page...
$parentPage = $this->owner->Parent();
if ($parentPage) {
// ... check if it has this field...
if ($parentPage->hasField($dbField)) {
$result = $parentPage->$dbField;
} else if (get_class($parentPage) != 'SiteTree') {
// ... if not call its parent.
$result = $parentPage->getFromParentPage($dbField);
}
}
return $result;
}
}
/**
* Does nothing else than just calling the parent, if exists, and returning $dbField or calling itself again.
*
* @see https://www.github.com/bringyourownideas/inheritage-by-sitetree
*
* @throws Exception
* @param string $dbField
* @return null|string|DataList
*/
/*
public function getFromParentPage($dbField)
{
if (!is_string($dbField)) {
throw new Exception('You can only give strings to getFromParentPage');
}
$result = null;
// if this isn't the top level page...
$parentPage = $this->Parent();
if ($parentPage) {
// ... check if it has this field...
if ($parentPage->hasField($dbField)) {
$result = $parentPage->$dbField;
} else {
// ... if not call its parent.
$result = $parentPage->getFromParentPage($dbField);
}
}
return $result;
}
*/