Revised the parameters of Period.

accounting/utils.py

@@ -34,7 +34,7 @@ class ReportUrl:
         if "period" in kwargs:
             self._period = kwargs["period"]
         else:
-            self._period = Period(None, None, None, None)
+            self._period = Period()
         if "cash" in kwargs:
             self._cash_subject = kwargs["cash"]
         else:

accounting/views/__init__.py

@@ -74,8 +74,7 @@ def cash(request, subject_code, period_spec):
     last_txn = Transaction.objects.order_by("-date").first()
     data_end = last_txn.date if last_txn is not None else None
     period = Period(
-        get_language(), data_start, data_end,
-        period_spec)
+        period_spec, data_start, data_end, get_language())
     # The SQL query
     if subject_code == "0":
         subject = Subject(code="0")