Retrieve taxonomy based on ACF field.

• goodenough

• June 14, 2022 at 7:56 am

I have a custom taxonomy called ‘Shows’.

I’m using the php below to show items from that taxonomy that also have the ACF field ‘podcast_country’ (type = text) populated with ‘Australia’.

This works perfectly in that case.

I also have an ACF field called ‘podcast_topic’ (type = taxonomy, appearance = multi-select, return value = Term Object). I would like to use a similar code block to retrieve items with the topic ‘educational’.

I cannot for the life of me work out how to do it. Other text fields work fine when checking against a single word, but when it comes to the taxonomy field I just get an empty screen – so clearly I’m missing something around that field type – but hours of searching and experimentation has gotten me nowhere.

What changes do I need to make to this to make it work with an ACF taxonomy field?

<?php
$madein = get_terms('shows',array('hide_empty' => 0));
        echo '<div class="row mb-5"><div class="col-12"><h3>Made in Australia</h3></div>';
        foreach($madein as $term)
        {
            if( get_field('podcast_country', 'shows_'.$term->term_id) != 'Australia' )
                continue;
          echo '<div class="col-6 col-md-3 col-lg-3 col-xl-2 p-2"><a href="' . get_term_link( $term ) . '">'; 
          echo wp_get_attachment_image( get_field('podcast_category_thumb', $term), 'thumbnail', false,  array('class' => 'img-responsive rounded','style' => 'width:100%;height: auto; aspect-ratio: 1 / 1') );
          echo '</a></div>';
        }
echo '</div>';
?>

• John Huebner

• June 14, 2022 at 10:22 am

If you are trying to show posts that have both a spcific “podcast_country” and a specific “podcast_topic” then you need to query posts instead of trying to list terms.

• goodenough

• June 14, 2022 at 1:00 pm

Thanks, but I’m trying to show the ‘Shows’ taxonomy items that have ‘podcast_topic’ applied to them. Not the posts.

• John Huebner

• June 14, 2022 at 1:13 pm

So I’m a little confused. You have a taxonomy field on a taxonomy. So when you’re editing a term in “podcast_country” you select a “podcast_topic”?

• goodenough

• June 14, 2022 at 2:08 pm

Kind of, the taxonomies are:

Shows
Country
Topics

Under shows I can assign a topic, and the country (amongst other fields) via ACF. The code I added at the top allows me to display a list of Show Taxonomy items based on the country field (podcast_country) – it’s a single item so I used a text field and the query was quite easy to create.

What I’m trying to do is list the Shows based on the ‘podcast_topic’ field, but because that’s a taxonomy it outputs as an array and I can’t figure out how to get it to work.

• John Huebner

• June 14, 2022 at 2:40 pm

Sorry, but I have no idea from your description what you are working or how these things relate to each other or to where you are entering the information.

• goodenough

• June 14, 2022 at 6:09 pm

No worries, thanks for taking the time to look. It turned out my main issue was converting the array to a string, in case this is ever useful to anyone else… this worked

<?php
  echo '<div class="row mb-5"><div class="col-12"><h3>History</h3></div>';
  foreach($madein as $term)
    {
    $a = get_field('podcast_topic', 'shows_'.$term->term_id); // get the field array
    $topicforuse = json_encode($a); // use json to convert to a string
    if (strpos($topicforuse, 'history') !== false) { //check the string for a keyword
      echo '<div class="col-6 col-md-3 col-xl-2 p-2"><a href="' . get_term_link( $term ) . '">'; 
      echo wp_get_attachment_image( get_field('podcast_category_thumb', $term), 'thumbnail', false,  array('class' => 'img-responsive rounded','style' => 'width:100%;height: auto; aspect-ratio: 1 / 1') );
      echo '</a></div>';
    }}
  echo '</div>';
?>