Displaying content of Advanced Custom Fields - php

Question

I’m having a little problem understanding what (my) PHP is doing when I’m trying to display different Custom Posts and Advanced Custom fields on the same page.
I have added different Advanced Custom Fields to a page, and I have custom posts that I am trying to display using the template.
I’m calling my custom fields throughout the template using:
<?php the_field(‘field-name’) ?>
My custom posts are called through loops like this (somewhere around the middle of the template):
<?php
$args = array(
'post_type' => ‘foo’
);
$foo = new WP_Query( $args );
if( $foo->have_posts() ) {
while( $foo->have_posts() ) {
$foo->the_post();
?>
<?php the_content() ?>
<?php
}
}
else {
// SOME MESSAGE
}
?>
The content of the Advanced Custom Fields is showing fine, above those loops. Below the loops it just doesn’t display.
I can’t figure out why the content is not showing up.
I assume it has to do with the while or if statements of the loops. If I remove the loops, the content of any Advanced Custom Field below does display.

Answer 1

When you use WP_Query(), you are changing the default $post variable on the page each time you loop through a post. You need to call wp_reset_postdata() after your loop to reset that $post variable so it corresponds to the current page again. You can call the function after your 'while' loop -
<?php
$args = array(
'post_type' => ‘foo’
);
$foo = new WP_Query( $args );
if( $foo->have_posts() ) {
while( $foo->have_posts() ) { $foo->the_post();
the_content();
} wp_reset_postdata();
}
else {
// SOME MESSAGE
}
?>