List with categories, subcategories and posts of custom posttype

Question

I am trying to query a list with all Categories, Subcategories and Posts of a custom post type.

e.g.:

Maincat1
  -Subcat1
     -Post1
     -Post2
  -Subcat2
  -Subcat3
Maincat2
  -Subcat3
     -Post3
Maincat3
  -Post4

I'm getting mad trying to accomplish that. I tried out so many things that I found on the web but I can't figure out how to get it to work.

What I have so far (working), All Categories + Subcategories but i don't get it how to query the posts from the Categories / Subcategories.

<?php

$orderby      = 'name';
$show_count   = 1;      // 1 for yes, 0 for no
$pad_counts   = 1;      // 1 for yes, 0 for no
$hierarchical = 1;      // 1 for yes, 0 for no
$title        = '';
$empty        = 0;

$args = array(
  'taxonomy'     => 'kategorie',
  'orderby'      => $orderby,
  'show_count'   => $show_count,
  'pad_counts'   => $pad_counts,
  'hierarchical' => $hierarchical,
  'title_li'     => $title,
  'hide_empty'   => $empty
);

?>
<?php

$parent_cat_arg = array('hide_empty' => false, 'parent' => 0 );
$parent_cat = get_terms('kategorie',$parent_cat_arg);//category name

foreach ($parent_cat as $catVal) {

    echo '<h3>'.$catVal->name.'</h3>'; //Parent Category

$args = array('post_type' => 'Dokumente',
        'tax_query' => array(
            array(
                'taxonomy' => 'kategorie',
                'field' => 'slug',
                'terms' => $custom_term->slug,
            ),
        ),
     );


$my_query = new WP_Query( $args );

if( $my_query->have_posts() ) {
    while ($my_query->have_posts()) : $my_query->the_post(); ?>
        <ul><li><a href="#" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a><li></ul><?php
    endwhile;
}

wp_reset_query();


    $child_arg = array( 'hide_empty' => false, 'parent' => $catVal->term_id );
    $child_cat = get_terms( 'kategorie', $child_arg );

    echo '<ul>';
        foreach( $child_cat as $child_term ) { 
            echo '<li>'.$child_term->name . '</li>'; //Child Category



$my_query = new WP_Query( $args );

if( $my_query->have_posts() ) {
    while ($my_query->have_posts()) : $my_query->the_post(); ?>
        <ul><li><a href="#" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a><li></ul><?php            
    endwhile;
}

wp_reset_query();
        }
    echo '</ul></li>';

}
?>
</div>
<?php

}

add_shortcode('kategorien', 'get_mylist' );

I also have the code to query the posts (at least i think it works) - but i don't know how to combine them.

$custom_terms = get_terms('kategorie');

foreach($custom_terms as $custom_term) {
wp_reset_query();

$args_slugs = array('post_type' => 'Dokumente',
        'tax_query' => array(
            array(
                'taxonomy' => 'kategorie',
                'field' => 'slug',
                'terms' => $custom_term->slug,
            ),
        ),
     );


     $loop = new WP_Query($args_slugs);
     if($loop->have_posts()) {
        while($loop->have_posts()) : $loop->the_post();
            echo '<ul><li><a href="'.get_permalink().'">'.get_the_title().'</a></li></ul><br>';
        endwhile;
     }
}

I really hope someone can help me... And yes I already used the search and found similar questions but none of the answers worked for me.

Best, NixXxon

Answer 1

@niko Please, find your required code, it will give you exact output you were seeking for. I think you were doing all right except in the final output you were missing the right structure.

Also, I recommand not to assign posts to the parent category as this structure not support that. However, I think with minor tweaks in following that can also be acheived.

<?php   
    $taxonomy = 'testimonial-category';
    $postType = 'testimonial';
    $terms = get_terms(['taxonomy' => $taxonomy, 'orderby' => 'term_id', 'parent' => 0, 'hide_empty' => false]);
?>
<div class="">
<?php
    foreach($terms as $term){
        echo '<h3>' . $term->name . '</h3>';
        $childTerms = get_terms(['taxonomy' => $taxonomy, 'orderby' => 'term_id', 'parent' => $term->term_id, 'hide_empty' => false]);

        foreach($childTerms as $childTerm)
        {
            $posts = get_posts(array('post_status' =>'publish','post_type' => $postType,
                    array(
                        'taxonomy' => $taxonomy,
                        'field' => 'term_id',
                        'terms' => $childTerm->term_id,
                    ),));
            ?>
            <div class="add-accordion">
                <h3><?php echo $childTerm->name ?></h3>
                <div class="add-accordion">
                    <?php foreach($posts as $post){ ?>
                        <h3><?php echo $post->post_title ?></h3>
                        <div class="">
                            <?php echo get_the_content($post->ID) ?>
                        </div>
                    <?php } ?>
                </div>
            </div>
            <?php
        }
    }
?>
</div>
<script>
    jQuery(function(){
        jQuery('.add-accordion').accordion({
            collapsible: true,
            heightStyle: "content",
            active: false,
            animate: 500,
            icons: false
        });
    });
</script>
<?php wp_enqueue_script('jquery-ui-accordion'); ?>

Answer 2

To display a list of all your categories, subcategories and posts inside each subcategory, use this code. Make sure to change your the arguments with your own taxonomy and post type and read the comments in the code for more clarification:

function ow_categories_with_subcategories_and_posts( $taxonomy, $post_type ) {

    // Get the top categories that belong to the provided taxonomy (the ones without parent)
    $categories = get_terms( 
        array(
            'taxonomy'   => $taxonomy,
            'parent'     => 0, // <-- No Parent
            'orderby'    => 'term_id',
            'hide_empty' => true // <!-- change to false to also display empty ones
        )
    );
    ?>
    <div>
        <?php
        // Iterate through all categories to display each individual category
        foreach ( $categories as $category ) {

            $cat_name = $category->name;
            $cat_id   = $category->term_id;
            $cat_slug = $category->slug;

            // Display the name of each individual category
            echo '<h3>Category: ' . $cat_name . ' - ID: ' . $cat_id . ' - Slug: ' . $cat_slug  . '</h3>'; 


            // Get all the subcategories that belong to the current category
            $subcategories = get_terms(
                array(
                    'taxonomy'   => $taxonomy,
                    'parent'     => $cat_id, // <-- The parent is the current category
                    '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() ):
                        ?>
                        <div>
                            <?php

                            // As long as there are posts to show
                            while ( $posts->have_posts() ): $posts->the_post();

                                //Show the title of each post with the Post ID
                                ?>
                                <p>Post: <?php the_title(); ?> - ID: <?php the_ID(); ?></p>
                                <?php

                            endwhile;
                            ?>
                        </div>
                        <?php
                    else:
                        echo 'No posts found';
                    endif;

                    wp_reset_query();
                }
                ?>
            </div>
            <?php
        }
        ?>
    </div>
    <?php
}
ow_categories_with_subcategories_and_posts( 'name_of_your_taxonomy', 'name_of_your_post_type' );