Reply To: update repeater field on acf/save_post

• John Huebner

• June 1, 2015 at 6:46 am

Usually, when I’m doing something like this with repeater fields I don’t actually use ACF functions or try to work directly with the values in $_POST.

Here’s an example of something I’d do, I do this because I know how ACF stores data and it’s just easier and faster to work with native WP functions for me.

post_updating_callback($post_id) {
  $repeater = 'my_repeater'; // the field name of the repeater field
  $subfield1 = 'subfield_1'; // the field I want to get
  $subfield2 = 'subfield_2'; // the field I want to set
  
  // get the number of rows in the repeater
  $count = intval(get_post_meta($post_id, $repeater, true);
  // loop through the rows
  for (i=0; $i<$count; $i++) {
    $get_field = $repeater.'_'.$i.'_'.$subfield1;
    $set_field = $repeater.'_'.$i.'_'.$subfield2;
    $value = get_post_meta($post_id, $get_field, true);
    // do whatever I need to calculate the value to set
    // $new_value will hold the value to set
    update_post_meta($post_id, $set_field, $new_value);
  }
}

Hope this helps.