Add links to parents in batch page.

yeast/templates/yeast/batch.html

@@ -9,14 +9,19 @@
     <div class="container">
 
   <h1>{{ batch.strain.name }}</h1>
-  <b>Source: {{ batch.get_source_display }}
+  <b>Source:</b> {{ batch.get_source_display }}
   {% if batch.source_batch %}
   from <a href="{{ batch.beer_url }}" target="_blank" rel="noopener noreferrer">#{{ batch.beer_num }}: {{ batch.beer_name }}</a>
-  {% endif %}
+  {% endif %}<br>
+
+  {% if batch.parent.all %} <b>Parents:</b>{% endif %}
+  {% for parent in batch.parent.all %}
+    <a href="{% url 'yeast:batch' parent.batch.id %}">{{ parent.batch.id}}</a>{% if not forloop.last %},{% endif %}
+  {% endfor %}
   </b>
   <p><p>
 
-    </div> <!-- /container -->  
+    </div> <!-- /container -->
   <div class="container">
     <div class="row">
     <div class="col-md-6 form-group">