Filter relationship field on taxonomy term page based on term

• timo

• December 8, 2014 at 9:52 pm

I’ve added a relationship field to a taxnomyterm field, in order to select certain posts that i want to ‘feature’ on the term page.

But this field returns all posts now, though i want to return only posts connected to that certain taxonomy.

I thought i could do that by using this function:
http://www.advancedcustomfields.com/resources/acf-fields-relationship-query/

So i created a tax query, for testing (tested the function in general, posts per page is working):

function my_relationship_query( $args, $field, $post )
{
    // increase the posts per page
    $args['posts_per_page'] = 10;
    $args['tax_query'] = Array(
	    'terms' => '30'
    );

    return $args;
    
}

But this still returns everything.

So 2 questions:

1 How to get this function right, so it returns only posts with certain term
2 How to access the term id object in this hook, so it works dynamically?

Maybe someone can help me out

• James

• June 8, 2015 at 3:19 pm

Hi @timo

For the tax_query, change your code to the following:

function my_relationship_query( $args, $field, $post )
{
    // increase the posts per page
    $args['posts_per_page'] = 10;
    $args['tax_query'] = array(
           array(
	    'terms' => '30'
           )
    );

    return $args;
    
}

Check out this link for more information: https://codex.wordpress.org/Class_Reference/WP_Query#Taxonomy_Parameters

For accessing the term object id dynamically, you could consider using get_queried_object() function. Here is the link to the documentation: https://codex.wordpress.org/Function_Reference/get_queried_object

• jcow

• January 18, 2018 at 1:20 am

The queried object isn’t working for me in that AJAX call. Also can’t access the $_REQUEST variables. Looking for a way to dynamically dial in the posts to the current tax as well…

• jcow

• January 18, 2018 at 1:27 am

I take that back. I could not access $_GET. I can access $_REQUEST (or $_POST specifically).

I get this from $_REQUEST:

Array
(
    [paged] => 1
    [taxonomy] => 
    [post_type] => 
    [s] => 
    [max] => 
    [min] => 
    [action] => acf/fields/relationship/query
    [field_key] => field_5a5deb8769362
    [post_id] => term_7
    [nonce] => 5aa22de3aa
)

So you can use ‘post_id’ and replace ‘term_’.

if ( ! empty($_REQUEST['post_id']) ) {
	$args['tax_query'] = array(
		array(
			'terms' => str_replace( 'term_', '', $_REQUEST['post_id'] );
		),
	);
}

• jcow

• January 29, 2019 at 7:50 am

Cleaned up basic customization below. The $_REQUEST['post_id'] is the same as the $post_id provided in the arguments.

function custom_relationship_query( $args, $field, $post_id ) {
	$args['tax_query'] = [
		[
			'taxonomy' => 'custom_taxonomy_name',
			'field'    => 'term_id',
			'terms'    => str_replace( 'term_', '', $post_id ),
		],
	];
	return $args;
}
add_filter('acf/fields/relationship/query', 'custom_relationship_query', 10, 3);