[wp-trac] [WordPress Trac] #28033: post_categories_meta_box on non-hierarchical custom taxonomy

[WordPress Trac]

#28033: post_categories_meta_box on non-hierarchical custom taxonomy
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 Reporter:  ByronicEntity               |       Owner:
     Type:  defect (bug)                |      Status:  new
 Priority:  normal                      |   Milestone:  Future Release
Component:  Taxonomy                    |     Version:  3.9
 Severity:  normal                      |  Resolution:
 Keywords:  needs-patch good-first-bug  |     Focuses:  ui, administration
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Comment (by rufein):

 I've done my first ticket.

 The documentacion in `register_taxonomy()` says explicitly:

   meta_box_cb - Provide a callback function for the meta box display.
   If not set, defaults to post_categories_meta_box for hierarchical
 taxonomies
   and post_tags_meta_box for non-hierarchical.

 The author of this ticket is setting manually the wrong function to manage
 non-hierarchical terms.

 I've reproduced the error and when an user create throungh Ajax a new
 term, the upper function creates the output reported in this thread. When
 the Ajax call is executed in server, it creates a new term that stores in
 database. At the end of the proccess, it creates options to be added to
 the form, but the function duplicate it because it also attach a parent
 option that not exist. So, finally, ajax add an non-existing term to the
 form. If you submit a non-existing term in the form, it will be created.
 If not, it will disappear.

 I've created a patch to avoid that function `post_categories_meta_box()`
 being assigned to a non-hierarchical taxonomies.

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Ticket URL: <https://core.trac.wordpress.org/ticket/28033#comment:5>
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