[wp-trac] [WordPress Trac] #24785: Nested loops and resetting post data

[WordPress Trac]

#24785: Nested loops and resetting post data
-------------------------+------------------------------
 Reporter:  ericlewis    |       Owner:
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  Awaiting Review
Component:  Query        |     Version:
 Severity:  normal       |  Resolution:
 Keywords:               |
-------------------------+------------------------------

Comment (by ericlewis):

 In attachment:24785.diff, I suggest we copy the function wp_reset_postdata
 into a method to the WP_Query class, so upon exiting a nested loop, this
 method can be called on the previous query object. A la:

 {{{
 <?php /* The loop */ ?>
 <?php while ( have_posts() ) : the_post(); ?>
         <?php
         // Build custom query
         $query = new WP_Query( array(
                 'posts_per_page' => 1
         ) );
         // Custom query loop
         if ( $query->have_posts() ) {
                 while ( $query->have_posts() ) {
                         $query->the_post();
                         // Build nested custom query
                         $subquery = new WP_Query( array(
                                 'posts_per_page' => 2
                         ) );
                         // Nested custom query loop
                         if ( $subquery->have_posts() ) {
                                 while ( $subquery->have_posts() ) {
                                         $subquery->the_post();
                                         echo '<li>' . get_the_title() .
 '</li>';
                                 }
                         } else {
                                 // no posts found
                         }
                         /* Restore custom query's post data */
                         $query->wp_reset_postdata();
                         echo '<li>' . get_the_title() . '</li>';
                 }
         } else {
                 // no posts found
         }

         /* Restore original Post Data */
         wp_reset_postdata(); ?>

 <?php endwhile; ?>
 }}}

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Ticket URL: <http://core.trac.wordpress.org/ticket/24785#comment:1>
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