我在admin cpt posts视图中添加了一个自定义下拉过滤器。

我正在使用以下功能连接“restrict\\u manage\\u posts”操作：

add_action(\'restrict_manage_posts\', \'show_filters\' );

function show_filters() {

    $tag = isset( $_GET[ \'partner\' ] ) ? esc_attr( $_GET[ \'partner\' ] ) : null;

    $args = array(
        \'post_type\' => \'partner\',
    );

    $partners_query = new WP_Query( $args );

    $partners_options = array( \'\' => \'Choose partner\' );

    if ( ! empty( $partners_query->posts ) ) {
        foreach ( $partners_query->posts as $partner ) {
            $partners_options[$partner->ID] = $partner->post_title;
        }
    } else {
        // Just for check that the query is returning empty
        $partners_options = array( \'\' => \'EMPTY QUERY: Debugging purposes\' );
    }       

    if ( ! empty( $partners_options ) ) {

        echo \'<select name="partner" class="postform">\';

        foreach ( $partners_options as $id => $name ) {
            if( $name ) {
                printf(\'<option value="%s"%s>%s</option>\', esc_attr( $id ), selected( $id, $tag, false), esc_html( $name ) );
            }
        }

        echo \'</select>\';
    }

}

EDIT: 我有一个pre\\u get\\u posts过滤器，它将meta\\u查询添加到过滤中：

add_action( \'pre_get_posts\', \'orderby_filtering\' );
function orderby_filtering( $query ) {
    if ( isset( $_GET[ \'partner\' ] ) && $_GET[ \'partner\' ] ) {
        $query->query_vars[\'meta_query\'][] = array(
             \'key\'      => \'partner_select\',
             \'value\'    => (int)$_GET[\' partner \']
        );
    }
}

过滤器工作正常，返回正确的值，但一旦执行，新的下拉列表将显示“空查询”消息，而不是应该显示的合作伙伴列表。

为什么不再执行查询？我错过了什么？谢谢