How do I add a field from Advanced Custom Fields before the page names?

Hi,

I have a similar issue but not sure the bcn_template_tags would solve it (maybe I don’t understand it correctly though).

In my case, I use two taxonomies:

• category (custom, but works like the native one)
• tag (native)

Using ACF, I created a parent > child relation between the category and the tag by adding a relation field to the tag.

Let say I have the following hierarchy :

- Category A
	- Tag A.1
	- Tag A.2
	- ...

Now in my breadcrumb, when I visit any one of the “child” tags, I would like it to look like this :

Home > Category A > Tag A.1
Home > Category A > Tag A.2

But for now I get :

Home > Tag A.1
Home > Tag A.2

As I understand, the bcn_template_tags “just” allows us to add a tag that will be replaced by a value, but what i need is to inject a hierarchy level in the breadcrum, based on the ACF field.

Is it doable?

Hi @mtekk

Thanks for your quick answer, unfortunately, I have no choice but to use ACF to setup my hierarchy as in my case, it must be between to different taxonomies (which is not supported natively by WP).

I also use Permalink Manager Pro on the same website and I use this hierarchy to fine tune the urls. It works well, now I just need to match the breadcrumb with my url structure.

@suil: sorry for incrusting myself in your thread, but i thought our issue is similar.

In case it can be usefull to anyone, I took the liberty to invertigate a little further the plugin code to understand how the breadcrumb is compile and managed to hook on the bcn_after_fill filter to achieve what I needed.

Here is the code I’m using:
I try to comment it as mutch as possible to help people understand and modify it as needed (but I won’t provide any suppport 🙂 ).

/**
 * Add parent "gamme" in the breadccrumb hierarchy for tag 
 * the hierarchy is set using ACF taxonomy field (to link the post_tag to a gamme)
 * 
 * If you need to test it in your own hierarchy, don't forget to replace the taxonomies slugs 
 * (aka: "post_tag" and "gamme")
 */
add_action('bcn_after_fill', 'ca_add_hierarchy_to_breadcrumb');
function ca_add_hierarchy_to_breadcrumb( $breadcrumb_trail ){
    // Can't have more than 2 entries in the breadcrumbs at this point for our usecase
    if(count($breadcrumb_trail->breadcrumbs) != 2) {
        return;
    }

    $first_key = 0;
    $last_key = count( $breadcrumb_trail->breadcrumbs ) - 1;

    $first_entry = $breadcrumb_trail->breadcrumbs[$first_key]; // bcn_breadcrumb object
    $last_entry = $breadcrumb_trail->breadcrumbs[$last_key]; // bcn_breadcrumb object

    // Check if last entry type match what we are looking for
    if( in_array( 'post_tag', $first_entry->get_types() ) ) {
        // 0 - Check if term has, indeed a parent
        // warning: I use an ACF function here because I know it is active
        $gamme_id = get_field( 'etiquette_gamme_parent', 'post_tag_' . $first_entry->get_id() ); 
        // Hierarchy not set: nothing to do
        if( empty( $gamme_id ) ) {
            return;
        }
        // 1 - Remove last entry 
        // don't worry it is stored in the $last_entry variable so we'll be able to reinject it later
        unset($breadcrumb_trail->breadcrumbs[$last_key]);
        // 2 - identify parent object 
        $gamme = get_term($gamme_id, 'gamme');
        // 3 - Inject parent in tray
        $breadcrumb_trail->add(new bcn_breadcrumb($gamme->name, NULL, array('gamme'), get_term_link($gamme, 'gamme'), $gamme_id, true)); 
        // 4 -Reinject last entry in tray
        $breadcrumb_trail->add($last_entry);
    }
}