1 files changed, 13 insertions, 0 deletions
diff --git a/chimere/main/forms.py b/chimere/main/forms.py
index c3cd810..76a2a17 100644
--- a/chimere/main/forms.py
+++ b/chimere/main/forms.py
@@ -116,6 +116,19 @@ required=False)' % (property.order, property.id, property.name,
             self.fields['start_date'].widget = AdminDateWidget()
             self.fields['end_date'].widget = AdminDateWidget()
 
+    def clean(self):
+        '''
+        Verify that a start date is provided when an end date is set
+        '''
+        if not settings.DAYS_BEFORE_EVENT:
+            return self.cleaned_data
+        if self.cleaned_data['end_date'] and \
+           not self.cleaned_data['start_date']:
+            msg = _(u"End date has been set with no start date")
+            self._errors["end_date"] = self.error_class([msg])
+            del self.cleaned_data['end_date']
+        return self.cleaned_data
+
     def save(self, *args, **keys):
         """
         Custom save method in order to manage associeted properties