add_filter('pre_get_posts', 'query_post_type');
function query_post_type($query) {
  global $oswcPostTypes;

  if(empty( $query->query_vars['suppress_filters'] ) ) {
    $post_type = get_query_var('post_type');
    //get theme options
    global $oswc_reviews;
    if($post_type) {
        $post_type = $post_type;
        $query->set('post_type',$post_type);
        return $query;
    } elseif(!is_page() && !is_preview() && !is_attachment()) {
        $post_type = array('post');
        foreach($oswcPostTypes->postTypes as $postType){
            array_push($post_type, $postType->id);
        }
        $query->set('post_type',$post_type);
        return $query;
    }
  }
}