use staticmethod from decorators

smash/web/forms/worker_form.py

@@ -50,7 +50,7 @@ class WorkerForm(ModelForm):
         
         self.fields['role'].initial = initial_role
         #use only the codename used in the code decorators 
-        self.fields['permissions'] = forms.ModelMultipleChoiceField(required=False, queryset=PermissionDecorator.permissions) 
+        self.fields['permissions'] = forms.ModelMultipleChoiceField(required=False, queryset=PermissionDecorator.get_permissions()) 
         if initial_permissions is not None:
             self.fields['permissions'].initial = [c.pk for c in initial_permissions]