带有图像的自定义类别查看器，回退到类别图像中的最新帖子

基于this 和this 答：我正在开发Walker\\u类别的扩展，该类别显示在ACF字段的图像中，返回到最新帖子的缩略图。

我在下面列出了整个步行者，但我认为问题在于$args 到WP_Query 和/或我在结果中循环的方式。

我每次都得到相同的图像，尽管tax_query 不同于：

$args = array(
  \'post_type\' => \'project\',
  \'tax_query\' => [
      \'taxonomy\' => \'project-category\',
      \'terms\' => $category->term_id,
  ],
  \'posts_per_page\' => 1,
  \'orderby\' => \'date\',
  \'order\' => \'ASC\'
);

$query = new WP_Query($args);

if ( $query->have_posts() ) {

  while ( $query->have_posts() ) {

    $query->the_post();

    global $post;

    $image = get_the_post_thumbnail_url( $post->ID, \'medium\', null );

  }

wp_reset_postdata();

据我所知WP_Query\' for each iteration (in which the ACF field is empty), but$image`每次都以相同的url结尾。

这些参数是这样的：

Array
(
    [post_type] => project
    [tax_query] => Array
        (
            [taxonomy] => project-category
            [terms] => 43
        )

    [posts_per_page] => 1
    [orderby] => date
    [order] => ASC
)
Array
(
    [post_type] => project
    [tax_query] => Array
        (
            [taxonomy] => project-category
            [terms] => 48
        )

    [posts_per_page] => 1
    [orderby] => date
    [order] => ASC
)
#etc...

更改$args 似乎每次都会返回不同的图像url。不应该\'posts_per_page\' => 1 每个查询只返回一篇帖子？

我错过了什么？

将整个Walker发布为gist.

class List_Category_Walker extends Walker_Category { function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) { $cat_name = apply_filters( \'list_cats\', esc_attr( $category->name ), $category ); $link = \'<a href="\' . esc_url( get_term_link( $category ) ) . \'" \'; $link .= \'>\'; // Get array of images from ACF Image field // Get array of images from ACF Image field if function_exists(\'get_field\'): $image_array = get_field(\'main_category_image\', \'term_\' . $category->term_id); else: $image_array = []; endif; // But if that\'s not set set it to image from latest post within category if (empty($image_array[\'sizes\'][\'medium\'])): // Get one post $args = array( \'post_type\' => \'project\', \'tax_query\' => array([ \'taxonomy\' => \'project-category\', \'terms\' => $category->term_id, ]), \'posts_per_page\' => 1, \'orderby\' => \'date\', \'order\' => \'ASC\' ); global $post; $query = new WP_Query($args); if ( $query->have_posts() ) { while ( $query->have_posts() ) { $query->the_post(); $image = get_the_post_thumbnail_url( $post->ID, \'medium\', null ); } wp_reset_postdata(); } else { // some default image } else: $image = $image_array[\'sizes\'][\'medium\']; endif; $link .= \'<img src="\' . $image . \'" alt="\'. $category->name .\'">\'; $link .= "<br/>" . $cat_name . \'</a>\'; if ( ! empty( $args[\'show_count\'] ) ) { $link .= \' (\' . number_format_i18n( $category->count ) . \')\'; } $output .= "\\t<li"; $class = \'cat-item cat-item-\' . $category->term_id; if ( ! empty( $args[\'current_category\'] ) ) { $_current_category = get_term( $args[\'current_category\'], $category->taxonomy ); if ( $category->term_id == $args[\'current_category\'] ) { $class .= \' current-cat\'; } elseif ( $category->term_id == $_current_category->parent ) { $class .= \' current-cat-parent\'; } } $output .= \' class="\' . $class . \'"\'; $output .= ">$link\\n"; } }

NavWalker引导错误(不会下拉)

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