Dashboard: fix operation form

1 files changed, 4 insertions, 2 deletions

diff --git a/ishtar_common/models.py b/ishtar_common/models.py
index 3af92a39e..610d92551 100644
--- a/ishtar_common/models.py
+++ b/ishtar_common/models.py
@@ -1800,7 +1800,7 @@ class DashboardFormItem(object):
         return q.order_by('pk').distinct('pk')
 
     @classmethod
-    def get_total_number(cls, fltr={}):
+    def get_total_number(cls, fltr=None):
         q = cls.objects
         if fltr:
             q = q.filter(**fltr)
@@ -1809,7 +1809,9 @@ class DashboardFormItem(object):
 
 class Dashboard(object):
     def __init__(self, model, slice='year', date_source=None, show_detail=None,
-                 fltr={}):
+                 fltr=None):
+        if not fltr:
+            fltr = {}
         # don't provide date_source if it is not relevant
         self.model = model
         self.total_number = model.get_total_number(fltr)