display warning message when there are no stats

i18n/de.po

@@ -68,6 +68,9 @@ msgstr ""
 msgid "New StatPeriod"
 msgstr ""
 
+msgid "No stats yet"
+msgstr ""
+
 msgid "Number of results :"
 msgstr ""
 

i18n/en.po

@@ -63,6 +63,9 @@ msgstr ""
 msgid "New StatPeriod"
 msgstr ""
 
+msgid "No stats yet"
+msgstr ""
+
 msgid "Number of results :"
 msgstr ""
 

i18n/es.po

@@ -63,6 +63,9 @@ msgstr ""
 msgid "New StatPeriod"
 msgstr ""
 
+msgid "No stats yet"
+msgstr ""
+
 msgid "Number of results :"
 msgstr ""
 

i18n/fr.po

@@ -63,6 +63,9 @@ msgstr "Nouvelle statistique de visites"
 msgid "New StatPeriod"
 msgstr "Nouvelle période de statistiques"
 
+msgid "No stats yet"
+msgstr "Pas encore de données sur les visites"
+
 msgid "Number of results :"
 msgstr "Nombre de résultats :"
 

views/primary.py

@@ -109,9 +109,14 @@ class StatGraph(EntityView):
               '(Any START, HITS WHERE H count HITS, H hit_type "normal", H period P, P start START, P stop STOP, H stats_about E, E eid %%(e)s %s)'
               ' UNION '
               '(Any START, 0 WHERE P is StatPeriod, P start START, P stop STOP, NOT EXISTS(H period P, H stats_about E, E eid %%(e)s) %s))')
+        plot_displayed = False
         for constraint, label in ((' HAVING STOP-START <= 20', _('Daily')),
                                   (' HAVING STOP-START >= 20', _('Monthly'))):
-            self.w(u'<h2>%s</h2>' % label)
             rset = self._cw.execute(rql % (constraint, constraint), {'e':entity.eid})
-            self.w(self._cw.view('plot', rset, 'null'))
+            if rset:
+                self.w(u'<h2>%s</h2>' % label)
+                self.w(self._cw.view('plot', rset, 'null'))
+                plot_displayed = True
+        if not plot_display:
+            self.w(u'<h2>%s<h2>' % _('No stats yet'))
         self.w(u'</div>')