Get stored field values from custom field

• SakoACFforum

• September 18, 2021 at 6:43 pm

Hi!

I would love to set up a custom field that gives the user the option to select values that have been saved into posts which use another field. Meaning: When I save 10 posts that have a custom color picker field I get 10 color values stored under this post type. How can I create a new custom field that shows in another post type from where the user can select one (or multiple) of those 10 color values?

Thanks Sascha

• BillysJunk

• September 20, 2021 at 2:18 pm

Following this topic too.

• jarvis

• September 22, 2021 at 5:29 am

I’m not sure if something like this could work:

<?php
##########################################
#  Populate ACF field with list of colours
##########################################
function load_colours_into_acf_select_field( $field ) {

	$args = array(
		'numberposts'	=> -1,
		'post_type'		=> array('post', 'page'),
		'meta_key'		=> 'colours', // your existing colur select field
	);

	// query
	$the_query = new WP_Query( $args );
	if( $the_query->have_posts() ):
		$colours = array();
		while( $the_query->have_posts() ) : $the_query->the_post();
		$colours[] = get_field('colours');
		endwhile;
	endif;

	// remove duplicates
	$filtered_colours = array_unique($colours);
	
	if ( $filtered_colours ) :
		//Add empty option
		$field['choices']["0"] = 'Select a colour';

		foreach ( $filtered_colours as $colour ) :
			$field['choices'] = $colour;
		endforeach;
	endif;

	return $field;
}

//Change colour_dropdown to your field which is assigned to your custom post type
add_filter( 'acf/load_field/name=colour_dropdown', 'load_colours_into_acf_select_field' );

Hopefully, the code/comments will help. It’s not tested and simply cobbled together, however, it should be a good starting point.