[wp-trac] [WordPress Trac] #52726: Allow default term when a user does not have assign_terms capability

[WordPress Trac]

#52726: Allow default term when a user does not have assign_terms capability
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 Reporter:  jeremyfelt    |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Taxonomy      |    Version:  5.5
 Severity:  normal        |   Keywords:
  Focuses:                |
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 After #43517, it is possible to register a default term along with a
 custom taxonomy, similar to how WordPress has long supported a default
 category.

 If I set the `assign_terms` capabilities on the `category` taxonomy to be
 `manage_categories` (admin/editor) and set a default category, authors are
 able to create new posts and those posts are assigned a default category.
 Authors are not able to adjust the categories.

 If I adjust the `assign_terms` capabilities on a custom taxonomy to be
 `manage_categories` and set a default term, authors are able to create new
 posts, but **no** default term is assigned.

 The current assignment of the default term is wrapped in the same logic as
 the assignment of non-default terms and happens within `current_user_can(
 $taxonomy_obj->cap->assign_terms )`.

 I would expect that default term assignment should happen outside of that
 `current_user_can()` check if no other terms are assigned.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52726>
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