[FIX] sale_order_report: add _get_downpayment_state

odex25_donation/sale_order_report/models/sale.py

@@ -23,6 +23,9 @@ class SaleOrder(models.Model):
                 return False
 
         return self.order_line.filtered(show_line)
+
+class SaleOrderLine(models.Model):
+    _inherit = 'sale.order.line'
     
     def _get_downpayment_state(self):
         self.ensure_one()