Hi @Exelmans Graphics
I think your issue lies within these lines of code:
<?php if ( get_sub_field("chart") ) : ?>
<?php foreach ( get_sub_field("chart") as $p ) : ?>
<?php echo get_permalink($p->ID); ?>
<?php if( get_field( 'highcharts_beschrijving_van_de_grafiek', $p->ID) ): ?>
<div class="description"><?php the_field('highcharts_beschrijving_van_de_grafiek', $p->ID) ?></div>
<?php endif; ?>
The first line is OK (testing to see if your ‘chart’ custom field exists) but the line after is a foreach which makes no sense in this context as the post object in your chart field is a single value.
If you want to get the data associated with another post using the post object field simply do something like the following:
<?php if ( get_sub_field("chart") ) :
$p = get_sub_field("chart");
// Variable now stores the post object for the post chosen by the user
//You can now do stuff with that post e.g.
$my_other_post = get_field( 'highcharts_beschrijving_van_de_grafiek', $p->ID);
//This is example only - I have no idea what this field is or does
if($my_other_post){
echo $my_other_post;
}
endif;// End check for chart field
?>
