我试图将滑块自定义帖子类型集成到WordPress中，但我似乎无法设置该自定义帖子类型的顺序（orderby:ID，order:ASC）。

我添加了supports => array(\'title\',\'page-attributes\'), 但当我更改幻灯片的顺序属性时，它不会更改其顺序（无论是在后端还是前端）。

这就是功能。php（它也会出现以下错误：Notice: Undefined index: post_type in .../functions.php on line 105)

function set_custom_post_types_admin_order($wp_query) {
$post_type = $wp_query->query[\'post_type\']; // line 105
    if ( $post_type == \'bxslider\') {
      $wp_query->set(\'orderby\', \'ID\');
      $wp_query->set(\'order\', \'ASC\');
    }
}
add_filter(\'pre_get_posts\', \'set_custom_post_types_admin_order\');

<?php 

// Create Slider

function hostify_bxslider_template() {

    // Query Arguments
    $args = array(
        \'post_type\' => \'bxslider\',
        \'orderby\' => \'ID\',
        \'order\' => \'ASC\',
        \'posts_per_page\' => -1
    );  

    // The Query
    $the_query = new WP_Query( $args );

    // Check if the Query returns any posts
    if ( $the_query->have_posts() ) {

        // Start the Slider ?>
        <div id="slider">

            <?php
            while ( $the_query->have_posts() ) : $the_query->the_post(); ?>
                <div>
                    <div class="slide">

                    <?php // Check if there\'s a BxSlider h2 given and if so post it
                    if ( get_post_meta( get_the_id(), \'bxslide_metabox_h2\', true) != \'\' ) { ?>
                        <h2><?php echo get_post_meta( get_the_id(), \'bxslide_metabox_h2\', true); ?></h2>
                    <?php } ?>

                    <?php // Check if there\'s a BxSlider h1 given and if so post it
                    if ( get_post_meta( get_the_id(), \'bxslide_metabox_h1\', true) != \'\' ) { ?>
                        <h1><?php echo get_post_meta( get_the_id(), \'bxslide_metabox_h1\', true); ?></h1>
                    <?php } ?>

                    <?php // Check if there\'s a BxSlider paragraph given and if so post it
                    if ( get_post_meta( get_the_id(), \'bxslide_metabox_text\', true) != \'\' ) { ?>
                        <p><?php echo get_post_meta( get_the_id(), \'bxslide_metabox_text\', true); ?></p>
                    <?php }

                    // Check if there\'s a BxSlider button link or button name given and if so post it
                    if ( get_post_meta( get_the_id(), \'bxslide_metabox_link\', true) != \'\' || get_post_meta( get_the_id(), \'bxslide_metabox_name\', true) != \'\' ) { ?>
                        <a href="<?php echo esc_url( get_post_meta( get_the_id(), \'bxslide_metabox_link\', true) ); ?>" class="button2"><?php echo get_post_meta( get_the_id(), \'bxslide_metabox_name\', true); ?></a>
                    <?php } ?>
                        <div class="clear"></div><br />
                    </div>
                </div>
            <?php endwhile; } ?>
        </div>

        <?php 

    // Reset Post Data
    wp_reset_postdata();
}

?>