Dynamic value for “select terms” in query

Hi there,

I use ACF and my thought was for each product page, to populate an ACF field that contained the category value and then somehow use that value in the query.

You can use the approach above. Then try adding this PHP snippet:

add_filter( 'generateblocks_query_wp_query_args', function( $query_args, $attributes, $block, $current ) {
	$category = get_post_meta( $current['post_id'], 'your_custom_field_key', true );

	if ( empty( $category ) ) {
		return $query_args;
	}

	if ( ! isset( $query_args['tax_query'] ) ) {
		$query_args['tax_query'] = [];
	}

	$query_args['tax_query'][] = [
		'taxonomy' => 'your_cpt_taxonomy',
		'field'    => 'slug',
		'terms'    => $category,
	];

	return $query_args;
}, 10, 4 );

Replace:
your_custom_field_key — the custom field meta key on the product page.
your_cpt_taxonomy — the taxonomy slug of the Logos CPT’s categories.
slug in 'field' — change to name or term_id depending on what the custom field stores.

Make sure you don’t add any parameters to the Query block.

I realize that $category won’t have a value if I’m not on a product page but wondering if it would be more efficient to check first?

Alvind’s code does check if $category has values first by this piece:

if ( empty( $category ) ) {
		return $query_args;
	}

Do you want to check if it’s on a product page first?

Also – a caveat for anyone else following along, I had more than one query on my page so I had to check I had the right query before updating the $query_args

In that case, you can add a custom class of logos-cpt-query to the Query block under Advanced > Additional CSS Classes, then use this updated snippet:

add_filter( 'generateblocks_query_wp_query_args', function( $query_args, $attributes, $block, $current ) {
	if ( empty( $attributes['className'] ) || strpos( $attributes['className'], 'logos-cpt-query' ) === false ) {
		return $query_args;
	}

	$category = get_post_meta( $current['post_id'], 'your_custom_field_key', true );

	if ( empty( $category ) ) {
		return $query_args;
	}

	if ( ! isset( $query_args['tax_query'] ) ) {
		$query_args['tax_query'] = [];
	}

	$query_args['tax_query'][] = [
		'taxonomy' => 'your_cpt_taxonomy',
		'field'    => 'slug',
		'terms'    => $category,
	];

	return $query_args;
}, 10, 4 );

This way, the snippet will only apply to that specific Query block.

So I’m asking if it would be more efficient to check if it is a product page first

If the Element’s Display Rules location is already set to Product Pages, that additional condition wouldn’t be necessary, since the Element will only display on product pages anyway.

You’re welcome! 🙂