[wp-trac] [WordPress Trac] #21378: get_the_category doesn't work for custom post types with custom taxonomies

[WordPress Trac]

#21378: get_the_category doesn't work for custom post types with custom taxonomies
--------------------------+---------------------------------------
 Reporter:  tcattitude    |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Taxonomy      |    Version:  3.4.1
 Severity:  normal        |   Keywords:  2nd-opinion needs-testing
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 I just got this problem and figured out a workaround.
 So i think i should post this here so devs can see if they can solve it in
 a more decent way.

 As title says, get_the_category fails if you ask for a custom post type
 WITH a custom taxonomy too (a combination of both).

 It's simple to reproduce.
 Just register a new post type, in my case was "videos". Then put a custom
 taxonomy for them too (my case, "categoria", spanish for category).
 (ref how to: http://new2wp.com/pro/wordpress-custom-post-types-and-
 taxonomies-done-right/, codex, etc ).
 As this pic: http://i.imm.io/xVdN.png

 Put some posts on that new custom post type with the new taxonomy.

 Then, you can try to call get_the_category inside a loop, our outside it
 passing the post ID get_the_category(ID) and it will fail.

 Outside the loop, like this:

 {{{
 $postid = '33';
 $catinfo = get_the_category($postid);
 var_dump($catinfo);
 }}}


 You only get an empty array:

 {{{
 array(0) { }
 }}}


 Into the loop, same history.

 And i think it's because custom taxonomy it's not "category" (the
 default).
 The problematic funcion has "category" as taxonomy hardcoded in the first
 line:
 http://wpseek.com/get_the_category/
 It says:

 {{{
 $categories = get_the_terms( $id, 'category' );
 }}}


 I was able to "fix" this, for me, just cloning that function in my theme's
 function.php, and changing that line to hardcode my custom taxonomy in
 there:

 {{{
 $categories = get_the_terms( $id, 'categoria' );
 }}}

 Then my custom get_the_category, with a postid supposed to be in that
 taxonomy, works.

 Obviously it's not the ideal workaround.
 I think the proper should be get_the_category can search other registered
 taxonomies too, automatically.
 If can't, maybe pass get_the_category a second argument so you can
 directly specify wich taxonomy should get_the_terms search for inside the
 function.

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Ticket URL: <http://core.trac.wordpress.org/ticket/21378>
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