[6.x] Fix origin() on null when fetching nav tree with origin_id field

[duncanmcclean]

This pull request fixes an issue where fetching a nav tree via the REST API with ?fields=origin_id would throw a Call to a member function origin() on null error when the nav contained an item not linked to an entry (e.g. a custom URL or text label).

This was happening because Page has no origin() method, so the call was forwarded to the page's entry via __call, which is null for items without an entry reference.

This PR fixes it by giving Page an origin() method that safely returns null when there's no entry, matching its other entry-delegating methods like slug() and status().

Fixes#13315

[duncanmcclean]

This pull request fixes an issue where fetching a nav tree via the REST API with ?fields=origin_id would throw a Call to a member function origin() on null error when the nav contained an item not linked to an entry (e.g. a custom URL or text label).

This was happening because Page has no origin() method, so the call was forwarded to the page's entry via __call, which is null for items without an entry reference.

This PR fixes it by giving Page an origin() method that safely returns null when there's no entry, matching its other entry-delegating methods like slug() and status().

Fixes#13315

[duncanmcclean]

This pull request fixes an issue where fetching a nav tree via the REST API with ?fields=origin_id would throw a Call to a member function origin() on null error when the nav contained an item not linked to an entry (e.g. a custom URL or text label).

This was happening because Page has no origin() method, so the call was forwarded to the page's entry via __call, which is null for items without an entry reference.

This PR fixes it by giving Page an origin() method that safely returns null when there's no entry, matching its other entry-delegating methods like slug() and status().

Fixes#13315

[duncanmcclean]

This pull request fixes an issue where fetching a nav tree via the REST API with ?fields=origin_id would throw a Call to a member function origin() on null error when the nav contained an item not linked to an entry (e.g. a custom URL or text label).

This was happening because Page has no origin() method, so the call was forwarded to the page's entry via __call, which is null for items without an entry reference.

This PR fixes it by giving Page an origin() method that safely returns null when there's no entry, matching its other entry-delegating methods like slug() and status().

Fixes#13315

[duncanmcclean]

This pull request fixes an issue where fetching a nav tree via the REST API with ?fields=origin_id would throw a Call to a member function origin() on null error when the nav contained an item not linked to an entry (e.g. a custom URL or text label).

This was happening because Page has no origin() method, so the call was forwarded to the page's entry via __call, which is null for items without an entry reference.

This PR fixes it by giving Page an origin() method that safely returns null when there's no entry, matching its other entry-delegating methods like slug() and status().

Fixes#13315

[duncanmcclean]

This pull request fixes an issue where fetching a nav tree via the REST API with ?fields=origin_id would throw a Call to a member function origin() on null error when the nav contained an item not linked to an entry (e.g. a custom URL or text label).

This was happening because Page has no origin() method, so the call was forwarded to the page's entry via __call, which is null for items without an entry reference.

This PR fixes it by giving Page an origin() method that safely returns null when there's no entry, matching its other entry-delegating methods like slug() and status().

Fixes#13315

[duncanmcclean]

This pull request fixes an issue where fetching a nav tree via the REST API with ?fields=origin_id would throw a Call to a member function origin() on null error when the nav contained an item not linked to an entry (e.g. a custom URL or text label).

This was happening because Page has no origin() method, so the call was forwarded to the page's entry via __call, which is null for items without an entry reference.

This PR fixes it by giving Page an origin() method that safely returns null when there's no entry, matching its other entry-delegating methods like slug() and status().

Fixes#13315

[duncanmcclean]

This pull request fixes an issue where fetching a nav tree via the REST API with ?fields=origin_id would throw a Call to a member function origin() on null error when the nav contained an item not linked to an entry (e.g. a custom URL or text label).

This was happening because Page has no origin() method, so the call was forwarded to the page's entry via __call, which is null for items without an entry reference.

This PR fixes it by giving Page an origin() method that safely returns null when there's no entry, matching its other entry-delegating methods like slug() and status().

Fixes#13315