Assuming I’ve understood your request correctly, replace
YOUR_FIELD_NAME_HERE with the field name of the relationship field you’ve created under the
school_class custom post type.
<?php // Get all school_class posts $args = array( 'post_type' => 'school_class', 'posts_per_page' => -1, ); // Generate the loop $loop = new WP_Query( $args ); while ( $loop->have_posts() ) : $loop->the_post(); // Get the relationship field_name that you've defined $posts = get_field('YOUR_FIELD_NAME_HERE'); if ( $posts ): foreach ( $posts as $post): // Set up the post for posts with that field_name setup_postdata($post); // Narrow the posts by the "easy" category // Refer to https://codex.wordpress.org/Function_Reference/has_category for more options if (has_category('easy')): // Print the whole post object // Do what you want from here print_r($post); endif; endforeach; // Reset the postdata so the page works correctly wp_reset_postdata(); endif; endwhile; ?>
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