[FIX] sale: unremove boring, old-fashioned onchange method on pricelist_id

addons/sale/sale.py

@@ -227,6 +227,12 @@ class sale_order(osv.osv):
             return 'sale.mt_order_sent'
         return super(sale_order, self)._track_subtype(cr, uid, ids, init_values, context=context)
 
+    def onchange_pricelist_id(self, cr, uid, ids, pricelist_id, order_lines, context=None):
+        if not pricelist_id:
+            return {}
+        pricelist = self.pool['product.pricelist'].browse(cr, uid, pricelist_id, context=context)
+        return {'value': {'currency_id': pricelist.currency_id.id}}
+
     def get_salenote(self, cr, uid, ids, partner_id, context=None):
         context_lang = context.copy()
         if partner_id:

addons/sale/sale_view.xml

@@ -170,7 +170,7 @@
                         </group>
                         <group>
                             <field name="date_order"/>
-                            <field domain="[('type','=','sale')]" name="pricelist_id" groups="product.group_sale_pricelist"/>
+                            <field domain="[('type','=','sale')]" name="pricelist_id" groups="product.group_sale_pricelist" on_change="onchange_pricelist_id(pricelist_id,order_line)"/>
                             <field name="currency_id" invisible="1"/>
                             <field name="validity_date"/>
                             <field name="payment_term_id" options="{'no_create': True}"/>

addons/website_sale/models/sale_order.py

@@ -315,6 +315,7 @@ class website(orm.Model):
             # update the pricelist
             if update_pricelist:
                 values = {'pricelist_id': pricelist_id}
+                values.update(sale_order.onchange_pricelist_id(pricelist_id, None)['value'])
                 sale_order.write(values)
                 for line in sale_order.order_line:
                     if line.exists():