The default taxonomy, category. By default, only those with the
edit_posts capability can assign categories during post creation/editing.
I have a role with very limited capabilities. I want to let users in this role be able to assign categories during custom-post-type creation/editing, but I cannot give them the
edit_posts capability and they should not be able to edit the taxonomy, only assign it.
How can I do this? Setting
'assign_terms' => 'read' is one option, but how can I set that value without having to re-register the taxonomy?
Or alternatively, how can I give my low-level role permission to assign the taxonomy?