request: disable requests for deleted vms

circle/dashboard/templates/dashboard/_vm-renew.html

@@ -8,7 +8,7 @@
   <a class="btn btn-default" href="{{object.get_absolute_url}}" data-dismiss="modal">
     {% trans "Cancel" %}
   </a>
-  {% if lease_types and not request.token_user %}
+  {% if object.active and lease_types and not request.token_user %}
   <a class="btn btn-primary" id="vm-renew-request-lease-button"
    href="{% url "request.views.request-lease" vm_pk=object.pk %}">
     <i class="fa fa-forward"></i>

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

@@ -59,8 +59,8 @@
         {% if instance.is_expiring %}<i class="fa fa-warning-sign text-danger"></i>{% endif %}
         <span id="vm-details-renew-op">
           {% with op=op.renew %}{% if op %}
-            <a href="{{op.get_url}}" class="btn btn-{{op.effect}} btn-xs
-                    operation operation-{{op.op}}">
+            <a href="{{op.get_url}}" class="btn btn-xs operation operation-{{ op.op }}
+              {% if op.disabled %}btn-default disabled{% else %}btn-{{op.effect}}{% endif %}">
               <i class="fa fa-{{op.icon}}"></i>
               {{op.name}}
             </a>

circle/request/views.py

@@ -208,6 +208,12 @@ class VmRequestMixin(LoginRequiredMixin, object):
         user = self.request.user
         if not vm.has_level(user, self.user_level):
             raise PermissionDenied()
+
+        if vm.destroyed_at:
+            message = _("Instance %(instance)s has already been destroyed.")
+            messages.error(self.request, message % {'instance': vm.name})
+            return redirect(vm.get_absolute_url())
+
         return super(VmRequestMixin, self).dispatch(*args, **kwargs)
 
     def get_context_data(self, **kwargs):