Reply To: Dynamically Loading Values From Adjacent Fields

• John Huebner

• March 26, 2016 at 7:08 am

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();
  
?>