一件不可思议的事情呈现在我面前：
使用post和ajax方法创建的自定义过滤器可以工作。
相反，LoopMulk按钮加载我的自定义帖子，但不考虑过滤器。
我相信wpquery调用有一些异常，$wp\u query->query\u vars似乎无法正常工作。就好像这两个功能不相互通信一样。
script.js

jQuery(function($){

    /*
     * Load More
     */
    $('#misha_loadmore').click(function(){

        $.ajax({
            url : misha_loadmore_params.ajaxurl, // AJAX handler
            data : {
                'action': 'loadmore', // the parameter for admin-ajax.php
                'query': misha_loadmore_params.posts, // loop parameters passed by wp_localize_script()
                'page' : misha_loadmore_params.current_page // current page
            },
            type : 'POST',
            beforeSend : function ( xhr ) {
                $('#misha_loadmore').text('Loading...'); // some type of preloader
            },
            success : function( data ){
                if( data ) {

                    $('#misha_loadmore').text( 'More posts' );
                    $('#misha_posts_wrap').append(data); // insert new posts
                    misha_loadmore_params.current_page++;

                    if ( misha_loadmore_params.current_page == misha_loadmore_params.max_page )
                        $('#misha_loadmore').hide(); // if last page, HIDE the button

                } else {
                    $('#misha_loadmore').hide(); // if no data, HIDE the button as well
                }
            }
        });
        return false;
    });

    /*
     * Filter*/

    $('#misha_filters').submit(function(){

        $.ajax({
            url : misha_loadmore_params.ajaxurl,
            data : $('#misha_filters').serialize(), // form data
            dataType : 'json', // this data type allows us to receive objects from the server
            type : 'POST',
            beforeSend : function(xhr){
                $('#misha_filters').find('button').text('Filtering...');
            },
            success:function(data){

                // when filter applied:
                // set the current page to 1
                misha_loadmore_params.current_page = 1;

                // set the new query parameters
                misha_loadmore_params.posts = data.posts;

                // set the new max page parameter
                misha_loadmore_params.max_page = data.max_page;

                // change the button label back
                $('#misha_filters').find('button').text('CERCA');

                // insert the posts to the container
                $('#misha_posts_wrap').html(data.content);

                // hide load more button, if there are not enough posts for the second page
                if ( data.max_page < 2 ) {
                    $('#misha_loadmore').hide();
                } else {
                    $('#misha_loadmore').show();
                }
            }
        });

        // do not submit the form
        return false;

    });

});

functions.php

function misha_script_and_styles() {
    // absolutely need it, because we will get $wp_query->query_vars and $wp_query->max_num_pages from it.
    global $wp_query;

    // when you use wp_localize_script(), do not enqueue the target script immediately
    wp_register_script( 'misha_scripts', get_stylesheet_directory_uri() . '/js/script.js', array('jquery') );

    // passing parameters here

    wp_localize_script( 'misha_scripts', 'misha_loadmore_params', array(
        'ajaxurl' => site_url() . '/wp-admin/admin-ajax.php', // WordPress AJAX
        'posts' => json_encode( $wp_query->query_vars ), // everything about your loop is here
        'current_page' => $wp_query->query_vars['paged'] ? $wp_query->query_vars['paged'] : 1,
        'max_page' => $wp_query->max_num_pages
    ) );

    wp_enqueue_script( 'misha_scripts' );

}

// LOAD More

// LOAD MORE NEW

add_action('wp_ajax_loadmore', 'misha_loadmore_ajax_handler'); // wp_ajax_{action}
add_action('wp_ajax_nopriv_loadmore', 'misha_loadmore_ajax_handler'); // wp_ajax_nopriv_{action}

function misha_loadmore_ajax_handler(){

    // prepare our arguments for the query
    $params = json_decode( stripslashes( $_POST['query_vars'] ), true );
    $params['paged'] = $_POST['page'] + 1; // we need next page to be loaded
    $params['post_type'] = 'cars';
    $params['post_status'] = 'publish';
    $params['orderby'] = 'date'; // add this to order by date
    $params['order'] = 'DESC'; // add this to display the most recent

    // it is always better to use WP_Query but not here
    query_posts( $params );

     //$query = new WP_Query($params);

    //global $wp_query;

   if(have_posts() ) :

        // run the loop
        while(have_posts() ): the_post();

             include ('page-templates/content/post-loadmore.php');

        endwhile;

    endif;
    die; // here we exit the script and even no wp_reset_query() required!
}

// Filter

add_action('wp_ajax_mishafilter', 'misha_filter_function');
add_action('wp_ajax_nopriv_mishafilter', 'misha_filter_function');

function misha_filter_function(){

        $params = array(
        'posts_per_page' => $_POST['10'],
        'post_type' => 'cars',
        'orderby' => 'date', // we will sort posts by date
        'status'  => 'published',   
        'order' => $_POST['date'], // ASC or DESC
        'tax_query' => [],
        'meta_query' => [
            'relation' => 'AND',
    ],
    );

    if( isset($_POST['code']) )
    {

        if(!empty($_POST['code']))
        {

          $params['meta_query'][] = array(

                      'key' => 'codice_cars',
                      'value' => sanitize_text_field( $_POST['code']) ,
                                );

            }

    }

    if( isset($_POST['tipologia_cars']) )
    {
        if(!empty($_POST['tipologia_cars']))
        {
    $params['tax_query'][] = [

    'taxonomy' => 'tipologia_cars',
    'field' => 'slug',
    'terms' => array( sanitize_text_field( $_POST['tipologia_cars'] ) )];

        }
    }

        if( isset($_POST['comune']) )
    {
        if(!empty($_POST['comune']))
        {
    $params['tax_query'][] = [

    'taxonomy' => 'comune',
    'field' => 'slug',
    'terms' => array( sanitize_text_field( $_POST['comune'] ) )];

        }
    }

    if( isset($_POST['price_above']) )
    {
        if(!empty($_POST['price_above']))
        {

        if( $_POST['price_above'] == 50000 ) {

            $params['meta_query'][] = array(

                                    'key' => 'prezzo',

                                );
            } else {

                $params['meta_query'][] = array(

                                        'key' => 'prezzo',
                                        'value' => sanitize_text_field( $_POST['price_above']) ,
                                        'type' => 'numeric',
                                        'compare' => '>='
                                );

            }

                        }
            }

            if( isset($_POST['price_below']) )
            {
                if(!empty($_POST['price_below']))
                {

                                if( $_POST['price_below'] == 2000000 ) {

                                    $params['meta_query'][] = array(

                                                            'key' => 'prezzo',

                                                        );
                                    } else {

                  $params['meta_query'][] = array(

                                        'key' => 'prezzo',
                                        'value' => sanitize_text_field( $_POST['price_below']) ,
                                        'type' => 'numeric',
                                        'compare' => '<='
                                );

                                            }
                                        }
                    }

                    if( isset($_POST['sortposts']) )
                    {
                            // let's create new array with args
                        if( !empty( $_POST['sortposts'] ) ) {
                            // I recommend to explode it because we're take 2 param values from one $_GET variable
                            $sort_params = explode( "-", $_POST['sortposts'] );
                            // $sort_args[0] is what we sort
                            // $sort_args[1] is how we sort - Ascending or Descending
                            $params['order'] = $sort_params[1];
                            if( $sort_params[0] == 'date' ) {
                                    // date is a default WP_Query value, so we do nothing
                                    $params['orderby'] == 'date';
                            } elseif( $sort_params[0] == 'property_price' ) {
                                    $params['orderby'] = 'meta_value_num';
                                    $params['meta_key'] = 'prezzo';
                            }
                        }
                    }

      query_posts( $params );

    global $wp_query;

    if( have_posts() ) :

        ob_start(); // start buffering because we do not need to print the posts now

        while( have_posts() ): the_post();

            include ('page-templates/content/post-loadmore.php');

        endwhile;

        $content = ob_get_contents(); // we pass the posts to variable
        ob_end_clean(); // clear the buffer

    endif;

    // no wp_reset_query() required

    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' => $content
    ) );

    die();

}