[wp-trac] [WordPress Trac] #32833: previous_post_link/next_post_link disappear when excluding by post_format

[WordPress Trac]

#32833: previous_post_link/next_post_link disappear when excluding by post_format
--------------------------+-----------------------------
 Reporter:  markshiz      |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.2.2
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 The following code gives me back a term_id from get_term_by, but causes
 the next/previous links to disappear:


 {{{
 <?php print_r(get_taxonomies()); ?>
 <?php print_r(get_term_by('slug', 'post-format-aside',
 'post_format')->term_id); ?>
 <?php previous_post_link('‹ %link', '%title', false,
 array(get_term_by('slug', 'post-format-aside', 'post_format')->term_id ));
 ?>
 <?php next_post_link('%link ›', '%title', false,
 array(get_term_by('slug', 'post-format-aside', 'post_format')->term_id ));
 ?>
 }}}


 The object returned by get_term_by is:


 {{{
 STDCLASS OBJECT ( [TERM_ID] => 10 [NAME] => ASIDE [SLUG] => POST-FORMAT-
 ASIDE [TERM_GROUP] => 0 [TERM_TAXONOMY_ID] => 10 [TAXONOMY] => POST_FORMAT
 [DESCRIPTION] => [PARENT] => 0 [COUNT] => 0 [FILTER] => RAW )
 UPDATE 2
 }}}


 When I enable the Wordpress query debugging, I see the following query
 being triggered, which is the empty set.


 {{{
 [mysql> SELECT P.ID FROM WP_POSTS AS P INNER JOIN WP_TERM_RELATIONSHIPS AS
 TR ON P.ID = TR.OBJECT_ID INNER JOIN WP_TERM_TAXONOMY TT ON
 TR.TERM_TAXONOMY_ID = TT.TERM_TAXONOMY_ID WHERE P.POST_DATE < '2015-06-01
 20:10:00' AND P.POST_TYPE = 'PROJECT' AND TT.TAXONOMY = 'CATEGORY' AND
 P.ID NOT IN ( SELECT TR.OBJECT_ID FROM WP_TERM_RELATIONSHIPS TR LEFT JOIN
 WP_TERM_TAXONOMY TT ON (TR.TERM_TAXONOMY_ID = TT.TERM_TAXONOMY_ID) WHERE
 TT.TERM_ID IN (10) ) AND ( P.POST_STATUS = 'PUBLISH' OR P.POST_STATUS =
 'PRIVATE' ) ORDER BY P.POST_DATE DESC ;]

 Empty set (0.01 sec)
 }}}

 What's strange about the above is that the query appears to be attempting
 to find the previous post based on the category taxonomy, which I have
 explicitly asked the function not to do through the query parameters. This
 seems like a bug in Wordpress to me.

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Ticket URL: <https://core.trac.wordpress.org/ticket/32833>
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