Evaluate device_id rather than pulling entire device (DB optimization)

netbox/templates/dcim/inc/interface.html

@@ -114,7 +114,7 @@
                     </a>
                 {% endif %}
             {% endif %}
-            <a href="{% if iface.device %}{% url 'dcim:interface_edit' pk=iface.pk %}{% else %}{% url 'virtualization:interface_edit' pk=iface.pk %}{% endif %}" class="btn btn-info btn-xs" title="Edit interface">
+            <a href="{% if iface.device_id %}{% url 'dcim:interface_edit' pk=iface.pk %}{% else %}{% url 'virtualization:interface_edit' pk=iface.pk %}{% endif %}" class="btn btn-info btn-xs" title="Edit interface">
                 <i class="glyphicon glyphicon-pencil" aria-hidden="true"></i>
             </a>
         {% endif %}
@@ -124,7 +124,7 @@
                     <i class="glyphicon glyphicon-trash" aria-hidden="true"></i>
                 </button>
             {% else %}
-                <a href="{% if iface.device %}{% url 'dcim:interface_delete' pk=iface.pk %}{% else %}{% url 'virtualization:interface_delete' pk=iface.pk %}{% endif %}" class="btn btn-danger btn-xs" title="Delete interface">
+                <a href="{% if iface.device_id %}{% url 'dcim:interface_delete' pk=iface.pk %}{% else %}{% url 'virtualization:interface_delete' pk=iface.pk %}{% endif %}" class="btn btn-danger btn-xs" title="Delete interface">
                     <i class="glyphicon glyphicon-trash" aria-hidden="true"></i>
                 </a>
             {% endif %}