Load bancopal price list in sale.

This commit refs #6142

__init__.py

@@ -3,6 +3,7 @@
 from trytond.pool import Pool
 from . import party
 from . import stock
+from . import sale
 
 
 def register():
@@ -10,4 +11,5 @@ def register():
         party.Party,
         party.BancopalPriceList,
         stock.Move,
+        sale.Sale,
         module='sale_bancopal', type_='model')

sale.py

@@ -0,0 +1,16 @@
+# The COPYRIGHT file at the top level of this repository contains the full
+# copyright notices and license terms.
+from trytond.pool import PoolMeta
+
+__all__ = ['Sale']
+
+
+class Sale:
+    __name__ = 'sale.sale'
+    __metaclass__ = PoolMeta
+
+    def on_change_party(self):
+        super(Sale, self).on_change_party()
+        if self.party and self.party.bancopal and \
+                self.party.bancopal_price_list:
+            self.price_list = self.party.bancopal_price_list

tests/scenario_sale_bancopal.rst

@@ -110,4 +110,12 @@ Discount applied when quantity is 10::
 
     >>> move.quantity = 10
     >>> move.unit_price
-    Decimal('5.0000')
+    Decimal('5.0000')
+
+Create a sale::
+
+    >>> Sale = Model.get('sale.sale')
+    >>> sale = Sale()
+    >>> sale.party = customer
+    >>> sale.price_list == price_list
+    True