I have portfolios connected to services.
I want to show only the works related to services A and C. How to do that?
Surely I have to use WP_Query, but I don’t know how:
$query = new WP_Query( array( 'post_type' => 'portfolio', <my filter id here> => array( array( <connected post type> => 'page', 'value' => array( <A service id>, <C service id> ), ) ) ) );
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