Reply To: Accept only unique values

• John Huebner

• March 24, 2017 at 12:27 pm

validating a row against other rows is a little different. For this you need to look at the other values in $_POST[‘acf’] and you’ll need to use the field keys.

So, let’s for this example say that the field key of the repeater is field_1111 and the field key of the text field is field_2222

add_filter('acf/validate_value/key=field_2222', 'acf_unique_repeater_sub_field', 10, 4);
function acf_unique_repeater_sub_field($valid, $value, $field, $input) {
  // set up an array to hold all submitted values for rows
  $list = array();
  foreach ($_POST['acf']['field_1111'] as $row) {
    if (in_array($row['field_2222'], $list)) {
      // this one already exists
      $valid = 'There are duplicate '.$field['name'].' values';
      // found a duplicate so we don't need to continue looping
      break;
    }
    // add the value of this row to the list
    $list[] = $row['field_2222'];
  }
  return $valid;
}