relationship-query.blade.php

@php

  // Get current post ID.
  $id = get_the_ID();

  // Get Relationship from post using it's ID
  $posts = get_field('posts', $id);

  $post_ids = array();
  $post_types = array();

  if($posts) {
    foreach($posts as $post) {
      $post_ids[] = $post->ID;
      $post_types[] = $post->post_type;
    }

    $args = array(
      'post_type'       => $post_types,
      'post__in'        => $post_ids,
    );
  }

  // New query using the arguments.
  $post_query = new \WP_Query($args);

@endphp

@php // Check query has posts. @endphp
@if($post_query->have_posts())
<div class="case-studies alignfull d-flex align-items-center has-blue-background-color vh-75">
  <div class="container-fluid d-flex h-100 align-items-center">
    <div class="row w-100">
      <div class="col-12 col-lg-10 offset-lg-1">
        <h2 class="text-uppercase has-white-color fw-light mb-4 mt-5">Related Case Studies</h2>
        @php $i = 0; @endphp
        @while ($post_query->have_posts()) @php $post_query->the_post() @endphp
          @php $i++ @endphp
        @endwhile
        @php $c = 1; @endphp
        <div class="post-slider">
          @while ($post_query->have_posts()) @php $post_query->the_post() @endphp
            @include('partials.content-'.get_post_type())
            @php $c++; @endphp
          @endwhile
        </div>
        <div class="arrows @if($c > 2) d-block d-lg-none @endif"></div>
        <small class="d-inline-block mt-3 mb-4 has-white-color">{!! $i !!} Case Studies</small>
      </div>
    </div>
  </div>
</div>
@endif