[MRG] filter by : opening only gives error message

account_financial_report_webkit/report/common_partner_reports.py

@@ -110,11 +110,14 @@ class CommonPartnersReportHeaderWebkit(CommonReportHeaderWebkit):
         if not periods:
             return []
 
+        if mode != 'include_opening':
             periods = self.exclude_opening_periods(periods)
 
         search_params = {'period_ids': tuple(periods),
                          'date_stop': period_stop.date_stop}
 
+        sql_conditions = ""
+        if periods:
             sql_conditions = "  AND account_move_line.period_id in %(period_ids)s"
 
         return sql_conditions, search_params