webui: Fixed template running instance number

one/models.py

@@ -283,6 +283,8 @@ class Template(models.Model):
             help_text=(_('Name of operating system in format like "%s".') %
             "Ubuntu 12.04 LTS Desktop amd64"))
 
+    def running_instances(self):
+        return self.instance_set.exclude(state='DONE').count()
     def os_type(self):
         if self.access_type == 'rdp':
             return "win"
@@ -294,7 +296,7 @@ class Template(models.Model):
 
     @transaction.commit_on_success
     def safe_delete(self):
-        if not self.instance_set.exists():
+        if not self.instance_set.exclude(state='DONE').exists():
             self.delete()
             return True
         else:

one/templates/box-templatelist.html

@@ -25,7 +25,7 @@
                         </span></li>
                         <li class="description">{% trans "Description" %}: <span class="value">{{t.description}}</span><div class="clear"></div></li>
                         <li class="date" >{% trans "Created at" %}: <span class="value">{{t.created_at}} ({{t.owner.get_profile}})</span><div class="clear"></div></li>
-                        <li class="count">{% trans "Running instances" %}: <span class="value">{{t.instance_set.count}}</span></li>
+                        <li class="count">{% trans "Running instances" %}: <span class="value">{{ t.running_instances }}</span></li>
                     </ul>
                 </div>
             </li>
@@ -72,7 +72,7 @@
                         </span></li>
                         <li class="description">{% trans "Description" %}: <span class="value">{{t.description}}</span><div class="clear"></div></li>
                         <li class="date" >{% trans "Created at" %}: <span class="value">{{t.created_at}} ({{t.owner.get_profile}})</span><div class="clear"></div></li>
-                        <li class="count">{% trans "Running instances" %}: <span class="value">{{t.instance_set.count}}</span></li>
+                        <li class="count">{% trans "Running instances" %}: <span class="value">{{t.running_instances}}</span></li>
                     </ul>
                 </div>
             </li>

one/views.py

@@ -89,15 +89,17 @@ def ajax_template_delete(request):
     except:
         return HttpResponse(unicode(_("Invalid template ID.")), status=404)
     template = get_object_or_404(Template, id=template_id)
-    if template.instance_set.exists():
+    if template.running_instances() > 0:
         return HttpResponse(unicode(_("There are running instances of this template.")), status=404)
     elif template.share_set.exists():
         return HttpResponse(unicode(_("Template is still shared.")), status=404)
     elif template.owner != request.user:
         return HttpResponse(unicode(_("You don't have permission to delete this template.")), status=404)
     else:
-        template.safe_delete()
-        return HttpResponse(unicode(_("Template successfully deleted.")))
+        if template.safe_delete():
+            return HttpResponse(unicode(_("Template successfully deleted.")))
+        else:
+            return HttpResponse(unicode(_("Unexpected error happened.")), status=404)
 
 def ajax_template_name_unique(request, name):
     s = "True"
@@ -107,12 +109,12 @@ def ajax_template_name_unique(request, name):
 
 @login_required
 def vm_credentials(request, iid):
-    vm = get_object_or_404(Instance, pk=iid)
-    if vm.owner == request.user:
+    try:
+        vm = get_object_or_404(Instance, pk=iid, owner=request.user)
         return render_to_response('vm-credentials.html', RequestContext(request, { 'i' : vm }))
-    else:
-        return HttpResponse("Stale id.")
-
+    except:
+        return HttpResponse(_("Could not get Virtual Machine credentials."), code=404)
+        messages.error(request, _('Failed to power off virtual machine.'))
 
 class AjaxTemplateWizard(View):
     def get(self, request, *args, **kwargs):