我有一个网站，列出出售的财产。我有一个自定义的wp\\u查询，并创建了一个排序下拉列表。此下拉列表按日期、价格（低-高&高-低）和床位（低-高&高-低）对帖子查询进行重新排序。价格和床位是自定义字段，仅包含数值。（无货币/逗号）。

更改时，AJAX会在下拉列表下方重新组织帖子。这一切都非常有效。

但是，有些房产没有价格（而是显示“按需价格”）。问题是，如果我将它们的价格设置为“0”，或者将这些属性的价格字段留空，那么它们将以0的价格按排序顺序出现。因此，当我按从低到高的价格对房产进行排序时，它们首先出现在列表中。

我需要正常运行排序，但如果属性价格==0，则将它们移到排序顺序的末尾，而不管选择的排序是什么。

这可能吗？可能是pre\\u get\\u帖子？

这是我的代码：

<select name="sort_by" class="sort_by_dropdown">
    <option value="dateposted-desc">Sort by Newest</option>
    <option value="price-desc">Sort by Price (High to Low)</option>
    <option value="price-asc">Sort by Price (Low to High)</option>
    <option value="bedrooms-desc">Sort by Beds (Most to Least)</option>
    <option value="bedrooms-asc">Sort by Beds (Least to Most)</option>
  </select>

<ul id="main_posts" class="item-listings">
<?php 
// Build the inital Loop
$args = array(
    \'posts_per_page\' => 9,
    \'paged\' => $paged
);

query_posts( $args );

if( have_posts() ) :

    while( have_posts() ): the_post();

        get_template_part( \'template-parts/post/content\', get_post_format() );

    endwhile;
endif;?>
</ul>

 // AJAX Stuff for filters

/*
 * Filter
 */
$(\'#filter\').change(function(){

    $.ajax({
        url : prop_loadmore_params.ajaxurl,
        data : $(\'#filter\').serialize(), 
        dataType : \'json\',
        type : \'POST\',
        success : function( data ){

            // reset current page to 1 when filters on
            prop_loadmore_params.current_page = 1;

            prop_loadmore_params.posts = data.posts;

            // set max page
            prop_loadmore_params.max_page = data.max_page;

            $(\'#main_posts\').html(data.content);

            $(".price-txt").digits(); // Add the commas!

            // If not enough posts for 2nd page, hide loadmore
            if ( data.max_page < 2 ) {
                $(\'#prop_loadmore\').hide();
            } else {
                $(\'#prop_loadmore\').show();
            }
        }
    });

    return false;

});

add_action(\'wp_ajax_prop_filters\', \'property_filters\'); 
add_action(\'wp_ajax_nopriv_prop_filters\', \'property_filters\');

function property_filters(){

    //*
    // Sort by Args
    //*

        if( isset( $_POST[\'sort_by\'] ) && $_POST[\'sort_by\'] == \'price-desc\' ) {
            $orderby = \'meta_value_num\'; 
            $order = \'DESC\';
            $meta_key = \'price\';
        }

        elseif( isset( $_POST[\'sort_by\'] ) && $_POST[\'sort_by\'] == \'price-asc\' ) {
            $orderby = \'meta_value_num\'; 
            $order = \'ASC\';
            $meta_key = \'price\';
        }
        elseif( isset( $_POST[\'sort_by\'] ) && $_POST[\'sort_by\'] == \'bedrooms-desc\' ) {
            $orderby = \'meta_value_num\'; 
            $order = \'DESC\';
            $meta_key = \'bedrooms\';
        }
        elseif( isset( $_POST[\'sort_by\'] ) && $_POST[\'sort_by\'] == \'bedrooms-asc\' ) {
            $orderby = \'meta_value_num\'; 
            $order = \'ASC\';
            $meta_key = \'bedrooms\';
        }
        else {
            $orderby = \'date\'; 
            $order = \'DESC\';
            $meta_key = \'\';
        }

 if (!is_user_logged_in()) {
    $args = array(
        \'posts_per_page\' => 9, 
        \'post_status\' => \'publish\',
        \'paged\' => $_POST[\'page\'],
        \'meta_key\' => $meta_key,
        \'orderby\' => $orderby,
        \'order\' => $order


    );
}
else {
    $args = array(
        \'posts_per_page\' => 9, 
        \'meta_key\' => $meta_key,
        \'orderby\' => $orderby,
        \'order\' => $order,
        \'post_status\' => array(\'publish\', \'private\'),
        \'paged\' => $_POST[\'page\']
    );
}

    query_posts( $args );

    global $wp_query;

    if( have_posts() ) :

        ob_start();

        while( have_posts() ): the_post();

            get_template_part( \'template-parts/post/content\', get_post_format() );

        endwhile;

        $posts_html = ob_get_contents(); 
        ob_end_clean(); 
    else:
        $posts_html = \'<p>Nothing found for your criteria.</p>\';
    endif;

    echo json_encode( array(
        \'posts\' => json_encode( $wp_query->query_vars ),
        \'max_page\' => $wp_query->max_num_pages,
        \'found_posts\' => $wp_query->found_posts,
        \'content\' => $posts_html
    ) );

    die();
}