我正在开发一个插件。有两个CPT：类别和菜肴。在我的编辑盘页面中，我尝试使用get_post_meta($post->ID, \'dish_price\', true) 问题是，我用来获取正在编辑的菜肴ID的任何函数都会返回在类别下拉列表中检索到的最后一个类别的ID。我做错了什么？

function meta_boxes(){
    /*Category meta boxes */
    remove_meta_box(\'commentstatusdiv\', \'category\', \'normal\');
    remove_meta_box(\'commentsdiv\', \'category\', \'normal\');
    remove_meta_box( \'postexcerpt\', \'category\', \'core\' );
    add_meta_box( \'description\', \'Description\', \'category_description_meta_box\', \'category\' );
    /* Dish meta boxes */
    remove_meta_box(\'commentstatusdiv\', \'dish\', \'normal\');
    remove_meta_box(\'commentsdiv\', \'dish\', \'normal\');
    remove_meta_box( \'postexcerpt\', \'dish\', \'core\' );
    add_meta_box( \'parent_id\', \'Category\', \'dish_category_metabox\', \'dish\' );
    add_meta_box( \'description\', \'Description\', \'dish_description_meta_box\', \'dish\' );
    add_meta_box(\'dish_price\', \'Price\', \'dish_price_meta_box\', \'dish\');
}

function category_description_meta_box(){
    global $post;
    //var_dump($post)
    echo \'<input type="hidden" name="category_noncename" id="category_noncename" value="\' .wp_create_nonce( plugin_basename(__FILE__) ) . \'" />\';

    echo \'<textarea style="width: 100%;" rows="5" name="description" id="description">\'.get_post_meta($post->ID, \'description\', true).\'</textarea>\';
}

function dish_description_meta_box(){
    global $post;
    //var_dump($post)
    echo \'<input type="hidden" name="dish_noncename" id="dish_noncename" value="\' .wp_create_nonce( plugin_basename(__FILE__) ) . \'" />\';

    echo \'<textarea style="width: 100%;" rows="5" name="description" id="description">\'.get_post_meta($post->ID, \'description\', true).\'</textarea>\';
}

function dish_price_meta_box(){
    global $post;
    echo \'$<input type="text" name="dish_price" id="dish_price" value="\'.get_post_meta($post->ID, \'dish_price\', true).\'">\';
}

function dish_category_metabox()
{
    global $post;
    $out = \'<select name="parent_id">\'.PHP_EOL;
    $args = array(
        \'post_type\' => \'category\',
        \'order\' => \'ASC\'
    );
    $the_query = new WP_Query($args);
    if ($the_query->have_posts()) {
        while ($the_query->have_posts()) {
            $the_query->the_post();
            $out .= \'<option value="\'.get_the_ID().\'"\';
            if(get_post_meta($post->ID, \'parent_id\', true) == get_the_ID()){
                $out .= \' SELECTED\';
            }
            $out .= \'>\'.get_the_title().\'</option>\'.PHP_EOL;
        }
    }
    $out .= \'</select>\'.PHP_EOL;
    echo $out;
}
add_action(\'add_meta_boxes\', \'meta_boxes\');