dashboard: filter already added interfaces

circle/dashboard/templates/dashboard/vm-detail/network.html

@@ -104,7 +104,7 @@
               <h4>{% trans "This VM doesn't have an IPv6 address!" %}</h4>
             {% endif %}
           </div><!-- /ipv6 -->
-          {% include "dashboard/vm-detail/network-port-add.html" %}
+          {% include "dashboard/vm-detail/_network-port-add.html" %}
         </div>
       </div>
     </div>
@@ -121,6 +121,9 @@
         {% csrf_token %}
         <div class="input-group" style="max-width: 330px;">
           <select name="new_network_vlan" class="form-control">
+            {% if vlans|length == 0 %} 
+              <option value="-1">No more networks!</option>
+            {% endif %}
             {% for v in vlans %}
               <option value="{{ v.pk }}">{{ v.name }}</option>
             {% endfor %}

circle/dashboard/views.py

@@ -154,7 +154,11 @@ class VmDetailView(CheckedDetailView):
         context['activity'] = ia
 
         context['vlans'] = Vlan.get_objects_with_level(
-            'user', self.request.user).all()
+            'user', self.request.user
+        ).exclude(
+            pk__in=Interface.objects.filter(
+                instance=self.get_object()).values_list("vlan", flat=True)
+        ).all()
         context['acl'] = get_acl_data(instance)
         context['forms'] = {
             'disk_add_form': DiskAddForm(prefix="disk"),