Here is an example of how I’d load values of a field in a row base on other sub fields of a repeater. It’s a little more complicated than a simple function.
<?php
// use a class so that we can store values rather than
// regenerate them for every row of the repeater
class load_dependency_field {
var $choices = array(); // hold the choices
function __construct() {
// use the field key when loading a subfield
add_filter('acf/load_field/key=field_56f0735c7223d', array($this, 'load_choices'));
} // and function
function load_choices($field) {
global $post;
if (get_post_type($post->ID) != 'questionnaire') {
// only run this when editing the post
return $field;
}
if (!count($this->choices)) {
// haven't done this before
$this->get_choices($post->ID);
}
$field['choices'] = $this->choices;
return $field;
} // end function
function get_choices($post_id) {
// example of using get_post_meta() instead of get_field for repeater
// this removes the possiblity of creating infinite loop in ACF
$repeater = 'questions';
$subfield = 'question';
$count = intval(get_post_meta($post_id, $repeater, true));
for ($i=0; $i<$count; $i++) {
$question = get_post_meta($post_id, $repeater.'_'.$i.'_'.$subfield);
$this->choices[$question] = $question;
}
} // end function
} // end class
// instantiate the class
new load_dependency_field();
?>
