Reply To: ACF Form Unique Value Validation

• gr8hoops21

• December 14, 2023 at 11:41 am

Ah perfect, thanks John you are a legend! Just in case anyone in the future needs the code, here is my final code

replaced
'post_type' => $post_type,
with
'post_type' => 'inventory',
since my CPT was inventory.

Final code:

add_filter('acf/validate_value/name=inventory_id', 'acf_unique_value_field', 10, 4);
function acf_unique_value_field($valid, $value, $field, $input)
{
    if (!$valid) {
        return $valid;
    }
    if (isset($_POST['post_ID'])) {
        $post_id = intval($_POST['post_ID']);
    } elseif (isset($_POST['post_id'])) {
        $post_id = intval($_POST['post_id']);
    } else {
        $post_id = false;
    }
    $field_name = $field['name'];
    $args = array(
        'post_type' => 'inventory',
        'post_status' => 'publish, draft, trash',
        'meta_query' => array(
            array(
                'key' => $field_name,
                'value' => $value
            )
        )
    );
    if (!empty($post_id)) {
        $args['post__not_in'] = array($post_id);
    }
    $query = new WP_Query($args);
    if (count($query->posts)) {
        return 'This Value is not Unique. Please enter a unique ' . $field['label'];
    }
    return true;
}