Period tye: start and end date are not mandatory

1 files changed, 6 insertions, 2 deletions

diff --git a/archaeological_operations/models.py b/archaeological_operations/models.py
index 14631bd10..cf44fa52a 100644
--- a/archaeological_operations/models.py
+++ b/archaeological_operations/models.py
@@ -46,14 +46,16 @@ class RemainType(GeneralType):
         verbose_name = _(u"Remain type")
         verbose_name_plural = _(u"Remain types")
         ordering = ('label',)
+
+
 post_save.connect(post_save_cache, sender=RemainType)
 post_delete.connect(post_save_cache, sender=RemainType)
 
 
 class Period(GeneralType):
     order = models.IntegerField(_(u"Order"))
-    start_date = models.IntegerField(_(u"Start date"))
-    end_date = models.IntegerField(_(u"End date"))
+    start_date = models.IntegerField(_(u"Start date"), null=True, blank=True)
+    end_date = models.IntegerField(_(u"End date"), null=True, blank=True)
     parent = models.ForeignKey("Period", verbose_name=_(u"Parent period"),
                                blank=True, null=True)
 
@@ -64,6 +66,8 @@ class Period(GeneralType):
 
     def __unicode__(self):
         return self.label
+
+
 post_save.connect(post_save_cache, sender=Period)
 post_delete.connect(post_save_cache, sender=Period)