Conditionally displaying nested relationships

Question

I have a bit of a complex relationship situation I'm trying to figure out in EE.

My channels consist of case-studies, clients, and services.

• I have a relationship field within each case-studies entry where I relate a client and service.
• Within the clients channel I relate items from the service channel.

I want to create tab-based clients page that lists clients segmented by the 4 services, with a link under each client to a page that lists their related case-studies.

Now I can list the clients fine, and the tabs are working the way they should, the problem I'm having is checking whether a client has related case studies or not and only displaying a link to that page IF that client has some related case-studies.

{exp:channel:entries channel="services" entry_id="4"}
<!-- I'm in the services channel, now I want to loop through the clients that are related to this service -->
  {parents field="client_related_service"}
    <div class="col-xs-12 col-sm-6 col-md-3 client-details">
    <p> <img src="{parents:client_logo}" class="img-responsive" alt="{title}"/></p>
    <p> {parents:client_description} </p>
    <!-- ONLY ADD THIS IF CLIENT HAS CASE-STUDIES RELATED TO IT, CAN'T FIGURE OUT HOW TO DO THIS-->
    <p> <a href="{site_url}index.php/clients/{parents:url_title}">See how we helped {parents:title}</a> </p>
    </div>
  {/parents}
{/exp:channel:entries}

Answer 1

Relationship tags are nest-able by continuing with the colon syntax:

{parents:parents field="case_study_related_client"}
<p><a href="{parents:parents:title_permalink="case-studies/index"}">See how we helped {parents:title}</a></p>
{/parents:parents}