显示自定义类别的子类别 - WordPress

Question

这是我所拥有的：

    $args = array(
        'type' => 'post',
        'child_of' => 0,
        'parent' => '',
        'orderby' => 'name',
        'order' => 'ASC',
        'hide_empty' => 1,
        'hierarchical' => 1,
        'exclude' => '',
        'include' => '',
        'number' => '',
        'taxonomy' => 'directory-category',
        'pad_counts' => false
    );

这让我知道了类别。

我想要的是获得这个directory-category 分类的子类别。

关于如何做到这一点的任何想法？

我不是在寻求解决方案，只是一个建议或有人给我指路。

谷歌搜索没有帮助：/

这是截图HERE

Answer 1

您说您不想直接回答，但实际上您想使用此处找到的 get_terms：

https://developer.wordpress.org/reference/functions/get_terms/

SELECT * from prod_term_taxonomy WHERE parent = 0;

更新：

// Using your specific parent taxonomy id of 214 the query is below
global $wpdb;
$results = $wpdb->get_results("SELECT * from prod_term_taxonomy WHERE taxonomy = 'directory-category'");

// then you can use WordPress get_term to query each object to get it's name based on it's term_id. $results will be an array of objects so you will use a foreach loop to loop through to get each $result like this...

$child_cat_array = array();

foreach ($results as $result) {
    $term = get_term( $result->term_id, $taxonomy );
    $name = $term->name;
    // the slug will be used for querying for posts
    $slug = $term->slug;
    // this will push the slug of the child category into the array for querying posts later
    array_push($child_cat_array, $slug);
}

然后您可以像这样修改您的 get_posts 查询：

$args = array(
    'tax_query' => array(
        array(
            'taxonomy' => 'directory-category',
            'field' => 'slug',
            'terms' => $child_cat_array
        )
    )
);

$postslist = get_posts( $args );

Answer 2

如果您想根据您提供的单个类别显示子类别和相关帖子的列表，您可以使用以下代码。确保使用您自己的分类名称、post_type 和术语：

function ow_subcategories_with_posts_by_category( $taxonomy, $post_type, $term ) {
    $category = get_term_by( 'slug', $term, $taxonomy );
    $cat_id   = $category->term_id;

    // Get all subcategories related to the provided $category ($term)
    $subcategories = get_terms(
        array(
            'taxonomy'   => $taxonomy,
            'parent'     => $cat_id,
            'orderby'    => 'term_id',
            'hide_empty' => true
        )
    );
    ?>
    <div>
        <?php
        // Iterate through all subcategories to display each individual subcategory
        foreach ( $subcategories as $subcategory ) {

            $subcat_name = $subcategory->name;
            $subcat_id   = $subcategory->term_id;
            $subcat_slug = $subcategory->slug;

            // Display the name of each individual subcategory with ID and Slug
            echo '<h4>Subcategory: ' . $subcat_name . ' - ID: ' . $subcat_id . ' - Slug: ' . $subcat_slug  . '</h4>';

            // Get all posts that belong to this specific subcategory
            $posts = new WP_Query(
                array(
                    'post_type'      => $post_type,
                    'posts_per_page' => -1, // <-- Show all posts
                    'hide_empty'     => true,
                    'order'          => 'ASC',
                    'tax_query'      => array(
                        array(
                            'taxonomy' => $taxonomy,
                            'terms'    => $subcat_id,
                            'field'    => 'id'
                        )
                    )
                )
            );

            // If there are posts available within this subcategory
            if ( $posts->have_posts() ):
                ?>
                <ul>
                    <?php
                    while ( $posts->have_posts() ): $posts->the_post();
                        //Show the title of each post with the Post ID
                        ?>
                        <li>Post: <?php the_title(); ?> - ID: <?php the_ID(); ?></li>
                        <?php
                    endwhile;
                    ?>
                </ul>
                <?php
            else:
                echo 'No posts found';
            endif;

            wp_reset_query();
        }
        ?>
    </div>
    <?php
}
ow_subcategories_with_posts_by_category( 'name-of-your-taxonomy', 'name-of-your-post-type', 'name-of-your-specific-term' );

'name-of-your-taxonomy' 是主要分类的名称。例如：'victual_category'

'name-of-your-post-type' 是您的帖子类型的名称。例如：'victual'

'name-of-your-specific-term' 是您要使用的特定类别的名称，以便可以显示属于该类别的子类别。例如：“食物”

所以如果我调用函数：

ow_subcategories_with_posts_by_category( 'victual_category', 'victual', 'food' );

这将显示所有子类别及其各自属于食品类别分类法的帖子：

子类别：开胃菜 - ID：35 - 蛞蝓：开胃菜

• 帖子：薯条和莎莎酱 - ID：464
• 帖子：Queso - ID：465

子类别：炸玉米饼 - ID：36 - 蛞蝓：炸玉米饼

• 职位：Al Pastor - ID：466
• 职位：Fish Al Pastor - ID：467