Add custom post types to the Loop (doing it wrong)

gistfile1.aw

<?php

if ( ! function_exists( 'ucc_pre_get_posts_filter' ) ) {
function ucc_pre_get_posts_filter( $query ) {
	if ( ! is_preview() && ! is_admin() && ! is_singular() && ! is_404() ) {
		if ( $query->is_feed ) {
			// As always, handle your feed post types here.
		} else {
			$my_post_type = get_query_var( 'post_type' );
			if ( empty( $my_post_type ) ) {
				$args = array(
					'public' => true ,
					'_builtin' => false
				);
				$output = 'names';
				$operator = 'and';

				// Get all custom post types automatically.
				$post_types = get_post_types( $args, $output, $operator );
				// Or uncomment and edit to explicitly state which post types you want. */
				// $post_types = array( 'event', 'location' );

				// Add 'link' and/or 'page' to array() if you want these included.
				// array( 'post' , 'link' , 'page' ), etc.
				$post_types = array_merge( $post_types, array( 'post' ) );
				$query->set( 'post_type', $post_types );
			}
		}
	}
} }
add_action( 'pre_get_posts' , 'ucc_pre_get_posts_filter' );

/*
	Copyright 2012 Jennifer M. Dodd <jmdodd@gmail.com>
	Released under the GPLv2 (or later).
*/

?>