Custom Links in Menu do not get post_parent set

[ascottme]

To recreate:

1. Create a menu
2. Add a "Custom Link" as a child of one of the menu items
3. In the database, the post_parent for that menu item is set to 0

Expected outcome:
The Custom Link should operate like other menu items, where the post_parent is set to the ID of the item it is nested under.

[justinahinon]

Welcome to Trac, and thanks for opening this @ascottme.

Could you clarify please, what you mean by "the post_parent for that menu"?

From what I'm aware of, post_parent in in the wp_posts table and refers to the site posts.