What happened?

Status Quo:

• Create menu entry "List All Categories in an Article Category Tree" for ROOT category [ME1]
  (= index.php?option=com_content&view=categories&id=0 )

• The default routes that do display ROOT category list do NOT match the menu entry:

  • index.php?option=com_content&view=categories
  • /component/content/categories

Expectations

• It would be expected that the default routes for displaying root categories tree match the corresponding menu entry for displaying root categories as there is no way to create Menu entries without ID parameter by default in the admin area (only by modifying the link of the menu entry in sql)

Sidenote: The default routes with parameter id=0 do match the menu entry route (as expected):

• index.php?option=com_content&view=categories?id=0
• /component/content/categories?id=0

Suggested Fixes
(a) treat missing id parameter as id=0 and match the ROOT category menu entry route?
(b) treat missing id parameter not as ROOT but rather as "404" or similar?

Affected Files
probably the com_content Router?

• /components/com_content/src/Service/Router.php

Version

6.1