Page.php - activeChild() throws error

[bkraegelin]

While trying to implement modular pages within my module I came across an error thrown by Page.php:

“Call to a member function root() on null” on line 2508

The code is
2506 $child_page = $pages->find($uri->route())->parent();
2507 if ($child_page) {
2508 while (!$child_page->root()) {
2509 if ($this->path() === $child_page->path()) {
2510 return true;
2511 }
2512 $child_page = $child_page->parent();
2513 }
2514 }

Looking around I found a similar/nearly identical function activeChild() in /system/src/Grav/Common/Flex/Types/Pages/Traits/PageRoutableTrait.php with code
109 $child_page = $page ? $page->parent() : null;
110 while ($child_page && !$child_page->root()) {
111 if ($this->path() === $child_page->path()) {
112 return true;
113 }
114 $child_page = $child_page->parent();
115 }

After changing Page.php the error was gone. This may be incorporated into the code of Page.php.

Thanks, Birger

[rhukster]

I think you should follow similar code to the PageRoutableTrait,

$child_page = $pages->find($uri->route())->parent() ?? null; 
while ($child_page && !$child_page->root()) {
...