How to extract values from Taxonomy Terms field

Hello,

Thanks for the feedback!

First, you have to focus on retrieving the Taxonomy Terms field value, and then adapt it to fit your tax_query.

Get the value

You said your Taxonomy Terms is inside a Flexible Content in the admin, which means you have to retrieve it using the have_rows(): the_row() > get_sub_field() logic, as explained in the ACF documentation. A typical usage example is:

// loop flexible content
if(have_rows('flexible_content')):
    while(have_rows('flexible_content')) : the_row();

        // my layout
        if(get_row_layout() === 'my_layout'):
            
            // taxonomy_terms
            $taxonomy_terms = get_sub_field('taxonomy_terms');

            // print
            print_r($taxonomy_terms);

        endif;
        
    endwhile;
endif;

In your code, I see you have some values with $feed_terms_order, $feed_terms_orderby if these are subfields from a Flexible Content too, you should be retrieving them the same way.

Use it within tax_query

You should note that the Taxonomy Terms, when displayed as checkbox/multi-select, allows users to select multiple terms, from different taxonomies. If that’s your case, you’ll have to loop on the $taxonomy_terms values (which will be an array of terms) and construct multiple tax_query, like this:

// prepare tax_query
$tax_query = array();

// loop taxonomy terms
foreach($taxonomy_terms as $term){
    
    // append tax_query for each selected term
    $tax_query[] = array(
        'taxonomy' => $term->taxonomy,
        'field'    => 'term_id',
        'terms'    => $term->term_id,
    ),
    
}

// get_posts args
$args = array(
    'posts_per_page' => $feed_terms_numberposts,
    'order'          => $feed_terms_order,
    'orderby'        => $feed_terms_orderby,
    'tax_query'      => array(
        'relation' => 'or',
        $tax_query, // use tax_query
    ),
);

Hope it helps!

Have a nice day!

Regards.

One last question!

Should the return format be as an ID or as an object?

Hello,

Since you’re constructing your own custom tax_query, you’ll need the $term->taxonomy & $term->term_id to populate it, as you can see in the code posted above. So it’s better to return the Object, as you already have access to these data.

If you decide to return Term ID only, you’ll have to retrieve each term object with get_term() (see documentation).

Hope it helps!

Regards.

Thank you very much. You resolved my issue.

Awesome!

Have a nice day!

Regards.