Take the 2-minute tour ×
WordPress Development Stack Exchange is a question and answer site for WordPress developers and administrators. It's 100% free, no registration required.

I am not sure why but I have used get_posts() to query for some data. Then I used setup_postdata() ... I think its used so that I can use functions like the_permalink() etc with the new post data?

<?php foreach ($childPosts as $cp) : setup_postdata($cp); ?>

<article <?php post_class() ?> id="post-<?php the_ID(); ?>">
  <h1><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h1>
  <?php if (has_post_thumbnail()) : ?>
  <a href="<?php the_permalink() ?>"><?php the_post_thumbnail(($hasOutputNotFeaturedDiv) ? 'thumb-small' : null) ?></a>
  <?php endif; ?>
  <?php the_excerpt(); ?>
  <p class="more"><a href="<?php the_permalink() ?>">Read more ...</a></p>
  <?php include (TEMPLATEPATH . '/inc/meta.php' ); ?>
</article>

<?php endforeach; ?>

but it appears that only the_excerpt contains the new post data value, why is that? I find that if I use echo get_the_permalink($cp) it works ok. But I think the shorter version will be better

share|improve this question

4 Answers 4

up vote 15 down vote accepted

I could be wrong, but from what I'm seeing, "setup_postdata()" should be used when doing a custom select query (not just query_posts): http://codex.wordpress.org/Displaying_Posts_Using_a_Custom_Select_Query

As well, if you want to use tags like "the_title()" and "the_permalink()" with that custom select query ... you'll need to use the variable name $post specifically (not another variable name) in setup_postdata() - AS WELL - you should call global $post before your "foreach" loop...

So basically follow that example in that codex link. And don't change the variable name $post - otherwise it breaks it.

HTH

share|improve this answer
1  
"you should call global $post" . YES! Why is that not in the Codex –  AlxVallejo Apr 26 at 17:11

When querying posts just use the normal loop with a set of arguments passed into it. Then reset the query at the end.

<?php 

    // makes query respect paging rules
    $paged = get_query_var('paged');

    // defining the arguements for the custom loop
    $variablenameQuery = array(
        'post_type'                 => 'seating-charts',
        'post_status'               => 'publish',
        'cust_tax_name'             => 'custom-tax-term',
        'posts_per_page'            => -1, // neg 1 means all posts
        'orderby'                   => 'date',
        'order'                     => 'ASC',
        'paged'                     => $paged,
    ); // end query

    // pass result into query_posts to get result
    query_posts($variablenameQuery);

?>
<?php if (have_posts()) : ?>

    <?php while (have_posts()) : the_post(); ?>

        <?php // Individual Post Styling ?>

    <?php endwhile; ?>

        <?php // paged navigation - next post, previous post... ?>

    <?php else : ?>

    <h3>Ooops looks like there was an issue. Please <a href="<?php echo get_option('home'); ?>/contact" title="Contact Us">get in touch</a> with us and we'll get the problem fixed.</h3>

<?php endif; ?>

<!-- resets the WordPress Query -->
<?php wp_reset_query(); ?>
share|improve this answer
    
Thanks, this works. But just for understanding, do you know why setup_postdata() does not seem to work? Did I use it wrongly? –  Jiew Meng Feb 19 '11 at 15:16
1  
@jiewmeng - See if using $post instead of $cp fixes the problem. –  t31os Feb 20 '11 at 1:28
    
I vote for the fix @t31os suggests. The examples on the codex show the usage like that and $post is a special variable in WordPress so it might do more inside a loop than what you've used. –  curtismchale Feb 20 '11 at 1:54
    
@t31os, @curtismchale, that didn't appear to work too. It still gives the same result –  Jiew Meng Feb 20 '11 at 2:11

Replace the

foreach ( $childPosts as $cp ) : setup_postdata( $cp );

with

foreach ( $childPosts as $post ) : setup_postdata( $post );

So you need to use the exact $post variable along with the setup_postdata().

share|improve this answer
    
This fixed the the problem I was having. Cheers mate –  Jeff K. Mar 2 '12 at 22:05

Depending on where you are using setup_postdata() (if it is not in the main loop, or in a function/sidebar widget, for example), you may also need to declare -

global $post;
share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.