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
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
Replace the
with
So you need to use the exact
$post
variable along with thesetup_postdata()
.Depending on where you are using setup_postdata() (if it is not in the main loop, or in a function/sidebar widget, for example), you may also need to declare –
global post;
does not work withsetup_postdata($post);
if you want to use thethe_title()
family of commands etc.It’s in https://codex.wordpress.org/Function_Reference/setup_postdata
Instead use
…also make sure your
$post_object
is a valid WP_Post object.2 important things to make this work,
use global $post variable to setup the postdata, else the loop functions will not see your custom post object.
VERY IMPORTANT: make sure to call
wp_reset_postdata()
function at the end of the loop else you may have weird errors which will be very difficult to debug.When querying posts just use the normal loop with a set of arguments passed into it. Then reset the query at the end.