[IMP] update the expiry dates when changing the product

Written in the new API even though the rest is in the old API, because otherwise we'd have to add an onchange in the views which may be a problem for existing custom modules.

We want this behavior because previously, in some cases the default values were only added at create() time, ie. possibily when the users close the pop-up, so they may never have an opportunity to see and adjust the default.

addons/product_expiry/product_expiry.py

@@ -21,6 +21,7 @@
 import datetime
 
 import openerp
+from openerp import api, models
 from openerp.osv import fields, osv
 
 class stock_production_lot(osv.osv):
@@ -75,6 +76,19 @@ class stock_production_lot(osv.osv):
     }
 
 
+# Onchange added in new api to avoid having to change views
+class StockProductionLot(models.Model):
+    _inherit = 'stock.production.lot'
+
+    @api.onchange('product_id')
+    def _onchange_product(self):
+        defaults = self.with_context(
+            product_id=self.product_id.id).default_get(
+                ['life_date', 'use_date', 'removal_date', 'alert_date'])
+        for field, value in defaults.items():
+            setattr(self, field, value)
+
+
 class stock_quant(osv.osv):
     _inherit = 'stock.quant'