add msg info em busca de dispositivos e msg de erro

sapl/compilacao/views.py

@@ -2892,7 +2892,21 @@ class DispositivoSearchFragmentFormView(ListView):
                 itens.append(item)
             return JsonResponse(itens, safe=False)
 
-        return ListView.get(self, request, *args, **kwargs)
+        response = ListView.get(self, request, *args, **kwargs)
+
+        if not self.object_list.exists():
+            messages.info(
+                request, _('Não foram encontrados resultados '
+                           'com seus critérios de busca!'))
+
+        try:
+            r = response.render()
+            return response
+        except Exception as e:
+            messages.error(request, "Erro - %s" % e)
+            context = {}
+            self.template_name = 'compilacao/messages.html'
+            return self.render_to_response(context)
 
     def get_queryset(self):
         try:

sapl/templates/compilacao/dispositivo_form_search_fragment.html

@@ -1,5 +1,14 @@
 {% load i18n compilacao_filters %}
 
+{% for message in messages %}
+  <div class="alert alert-{% if message.tags == 'error' %}danger{% else %}{{ message.tags }}{% endif %} alert-dismissible fade in" role="alert">
+    <button type="button" class="close" data-dismiss="alert" aria-label="Close">
+      <span class="glyphicon glyphicon-remove" aria-hidden="true"></span>
+    </button>
+    {{ message|safe }}
+  </div>
+{% endfor %}
+
 {% if object_list.count >= 100 %}
   <div class="alert-box success radius">
     {% trans 'Use argumentos para simplificar listagem...' %}

sapl/templates/compilacao/messages.html

@@ -0,0 +1,10 @@
+{% load i18n compilacao_filters %}
+
+{% for message in messages %}
+  <div class="alert alert-{% if message.tags == 'error' %}danger{% else %}{{ message.tags }}{% endif %} alert-dismissible fade in" role="alert">
+    <button type="button" class="close" data-dismiss="alert" aria-label="Close">
+      <span class="glyphicon glyphicon-remove" aria-hidden="true"></span>
+    </button>
+    {{ message|safe }}
+  </div>
+{% endfor %}