从posts_where wordpress内部获取帖子id

如何从posts_where内部获取post id？

在下面的代码中，$page_id=$wp_query->get_queried_object_id（）；适用于页面，但不适用于帖子。我已经设置了第二个变量$post_id，并想用post的id来填充它。

这是我的功能/过滤器：

// Filter posts
    function ugrestriction_filter( $where, $wp_query )
    {
        global $wpdb, $post, $current_user, $wp_query;
        get_currentuserinfo();
        $user_id = $current_user->ID;
        $page_id = $wp_query->get_queried_object_id();
        $post_id = $wp_query->get_queried_object_id();
        $meta_key1    = '_ugrestriction';
        $meta_key1_value  = 'on';
        $postids=$wpdb->get_col( $wpdb->prepare( 
          "SELECT post_id FROM $wpdb->postmeta WHERE meta_key = %s AND meta_value = 'on'", "_ugrestriction"
        ) ); 

        //$postids = array("70", "1", "2", "3");
        if (in_array($post_id, $postids)) {
          $filter = 'on';
        } elseif (in_array($page_id, $postids)) {
          $filter = 'on';
        } 

        if ( $filter == 'on') {
          $where .= " AND ($wpdb->postmeta.meta_key = '_ugrestriction' AND $wpdb->postmeta.meta_value = 'on' AND " .  $wpdb->posts . " .post_author =". $user_id .")";
        }
            return $where;
    }
    add_filter( 'posts_where', 'ugrestriction_filter', 10, 2 );