Question

我遵循了here的教程。但我想让它用ajax加载来过滤多类别/分类法。

设置过滤器后，当我点击加载更多时，它会显示所有类别帖子，而不是已检查的类别

无论如何都要在加载更多时显示已检查的类别。

的index.php

<form id="misha_filters" action="#">
      <div class="checkbox-wrap">
        <input type="checkbox" id="fi1-all" name="categoryfilter-all" value="all" checked>
        <label for="fi1-all" class="cat-all">
          <?php
            $args = array(
              'posts_per_page' => -1,
              'post_status' => 'publish',
              'category' => '-1', // except uncategorized
            );
            $posts_array = get_posts( $args );
            $total_post = count($posts_array);
          ?>
          All (<?php echo $total_post ?>)
          <span class="icon-check"><?php include 'inc/vectors/check-for-checkbox-white.svg' ?></span>
        </label>
      </div>
      <?php
            if( $terms = get_terms( 'category', 'orderby=name' ) ) :
          $a = 0;
                foreach ( $terms as $term ) :
          $a++;
          if ( $term->slug !== 'uncategorized' ) :
        ?>
          <div class="checkbox-wrap">
            <input type="checkbox" id="fi1-<?php echo $a ?>" name="categoryfilter-<?php echo $a ?>" value="<?php echo $term->term_id ?>">
            <label for="fi1-<?php echo $a ?>" class="cat-<?php echo $term->slug ?>">
              <?php echo $term->name ?> (<?php echo $term->count; ?>)
              <span class="icon-check"><?php include 'inc/vectors/check-for-checkbox-white.svg' ?></span>
            </label>
          </div>
      <?php
          endif;
                endforeach;
            endif;
        ?>

function.php

add_action( 'wp_enqueue_scripts', 'misha_script_and_styles');

function misha_script_and_styles() {

    global $wp_query;


    wp_register_script( 'misha_scripts', get_stylesheet_directory_uri() . '/inc/script-filter-loadmore.js', array('jquery') );



    wp_localize_script( 'misha_scripts', 'misha_loadmore_params', array(
        'ajaxurl' => site_url() . '/wp-admin/admin-ajax.php', 
        'posts' => json_encode( $wp_query->query_vars ), 
        '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' );
}







add_action('wp_ajax_loadmorebutton', 'misha_loadmore_ajax_handler');
add_action('wp_ajax_nopriv_loadmorebutton', 'misha_loadmore_ajax_handler');

function misha_loadmore_ajax_handler(){


    $taxonomy = 'category';
    $taxonomy_terms = get_terms( $taxonomy, array(
                                            'hide_empty' => 0,
                                            'fields' => 'ids',
                                            'exclude' => get_cat_ID('uncategorized'),
                                        ));
    $form_filter_checkboxes = array($_POST['categoryfilter-1'], $_POST['categoryfilter-2'],
                                                                    $_POST['categoryfilter-3'], $_POST['categoryfilter-4'],
                                                                    $_POST['categoryfilter-5'], $_POST['categoryfilter-6'],
                                                                    $_POST['categoryfilter-7']); 



    $params = json_decode( stripslashes( $_POST['query'] ), true ); 
    $params['paged'] = $_POST['page'] + 1; 
    $params['post_status'] = 'publish';
    $params['posts_per_page'] = '3';
    $params['tax_query'] =  array(
                                                        'taxonomy' => $taxonomy,
                                                        'field' => 'id',
                                                        'terms' => $form_filter_checkboxes,
                                                    )
                                                ;


    query_posts( $params );
    global $wp_query;

    if( have_posts() ) :
        while( have_posts() ): the_post();
            get_template_part( 'template-parts/post/post-type-content', get_post_format() );
        endwhile;
    endif;
    die; 
}



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

function misha_filter_function(){



    $params = array(
        'orderby' => 'date', 
        'order' => 'DESC', 
        'post_status' => 'publish',
        'posts_per_page' => 2
    );




    $taxonomy = 'category';
    $taxonomy_terms = get_terms( $taxonomy, array(
                                            'hide_empty' => 0,
                                            'fields' => 'ids',
                                            'exclude' => get_cat_ID('uncategorized'),
                                        ));
    $form_filter_checkboxes = array($_POST['categoryfilter-1'], $_POST['categoryfilter-2'],
                                                                    $_POST['categoryfilter-3'], $_POST['categoryfilter-4'],
                                                                    $_POST['categoryfilter-5'], $_POST['categoryfilter-6'],
                                                                    $_POST['categoryfilter-7']);




    if ( $_POST['categoryfilter-all'] === 'all') :
        $params['tax_query'] = array(
            array(
                'taxonomy' => $taxonomy,
                'field' => 'id',
                'terms' => $taxonomy_terms,
            )
        );
    else :
        $params['tax_query'] = array(
            array(
                'taxonomy' => $taxonomy,
                'field' => 'id',
                'terms' => $form_filter_checkboxes,
            )
        );
    endif;




    query_posts( $params );


    global $wp_query;
    if( have_posts() ) :

        ob_start(); 

        while( have_posts() ): the_post();
            echo $_POST['categoryfilter-all'];
            get_template_part( 'template-parts/post/post-type-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' => serialize( $wp_query->query_vars ),
        'max_page' => $wp_query->max_num_pages,
        'found_posts' => $wp_query->found_posts,
        'content' => $posts_html
    ) );

    die();
}

JS档案

jQuery(function($){

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

        $.ajax({
            url : misha_loadmore_params.ajaxurl, // AJAX handler
            data : {
                'action': 'loadmorebutton', // 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( posts ){
                if( posts ) {

                    $('#misha_loadmore').text( 'More posts' );
                    $('#misha_posts_wrap').append( posts ); // 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('Apply filter');

                // 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;

    });

});

Answer 1

LinkedList<Long> list = new LinkedList<>();
int pos=1;
System.out.println("pos+1:"+(pos+1));
list.remove((int)pos+1); //Add an explicit cast here to your above code!

以上行未调用过滤器查询循环。这就是为什么，你无法获得由misha_filter_function（）{}设置的查询循环。

更新（已修复）：请检查以下更新。

实际问题是

$params = json_decode( stripslashes( $_POST['query'] ), true );

返回的不是JSON格式数据，而是返回序列化数据形式。所以使用json_encode没有任何意义。只需更改此行

即可

$_POST['query']

到这个

$params = json_decode( stripslashes( $_POST['query'] ), true );

然后它必须工作。一切顺利（y）

Answer 2

我不知道您是否还有问题，但这是我的解决方案，只需更改即可：

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

TO

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
) );

我刚刚将serialize更改为json_encode，这是正确的方法，您将获得您的条款帖子！

您不应像Deepak那样使用反序列化。这是非常不安全的。 manual中有一个红色警告，通过搜索PHP对象注入，您可以轻松找到其危险性的解释。

帮个忙，并使用json_encode / decode。因为query_vars是一个简单的数组，所以不会有什么区别。

使用多类别过滤器加载wordpress ajax

2 个答案: