Help with relationship/query HOOK

• tex77

• December 11, 2015 at 1:04 pm

Hi there!

I am trying to use the relationship/query HOOK, to filter the posts available in the Relationship field.

I have two CPTs:
– project
– service

I am using the awesome plugin CPT-onomies to create/register these cpts, so that the Service cpt can also be a taxonomy for the Project cpt.

This works great. For example:
– Project “Acme” has a Service taxonomy term “Consulting”.
– “Consulting” also has a full (cpt) post of its own (unlike a normal taxonomy term, without using CPT-onomies).

On this “Consulting” post/page, I want to show a CURATED LIST of the Projects that have the “Consulting” service.. so rather than ALL those projects (in which case I’d just to a wp_query), I want to select only SOME of those projects, and MANUALLY set the order. This is a perfect use of the ACF Relationship field.

On the admin > edit-post screen for Consulting (remember, it’s really a cpt post), is my ACF Relationship field, in which the left side should show ALL Projects that have “Consulting” as a Service taxonomy term, from which i can make my curated selections (building a list on the right side).

My ACF field setup is:

– Field Name = curated_projects
– Field Type = Relationship
– Filter by Post Type = Projects
– Filter by Taxonomy = (blank/all)
– Filters = Search (yes); Post Type (no); Taxonomy (no)

Then i can use the “relationship/query” HOOK to filter the Projects for the “Consulting” term.

add_filter('acf/fields/relationship/query/name=curated_projects', 'my_relationship_query', 10, 3);
function my_relationship_query( $args, $field, $post )
{
	$service_slug = 'consulting';  // make this DYNAMIC!!!

	$args['tax_query'] = array( 
			array(
				'taxonomy' => 'service',
				'field'    => 'slug',
				'terms'    => $service_slug,
			),
		);
    return $args;
}

This works perfectly — when the tax-term is HARD-CODED (in the $service_slug var). But I can’t seem to make it work DYNAMICALLY, based on the slug of the post currently being edited (‘consulting’).

The function gets the $post object, so i expected this would work:
$service_slug = $post->post_name;
but the result (in the Relationship field) is “No matches found”.

I tried adding
global $post
but no luck.

I tried just using the post ID from the url:

	$service_id = $_GET['post'];
	$service = get_post( $service_id );
	$service_slug = $service->post_name;

but again “No matches found”.

Any ideas?? Why does it work perfectly when $service_slug is hard-coded, but not from the $post->post_name (slug)?

Thanks in advance.

• James

• June 19, 2016 at 9:17 pm

Hi @tex77,

Thanks for the post.

I am a bit lost in your description, shouldn’t you be passing the current term assigned to the post being edited?

This can be achieved by the get_the_terms() function.