diff --git a/addons/lunch/lunch.py b/addons/lunch/lunch.py
index 82c3bf8e51b..0f9033fce38 100644
--- a/addons/lunch/lunch.py
+++ b/addons/lunch/lunch.py
@@ -373,24 +373,11 @@ class lunch_order_line(osv.Model):
             cashmove_ref.unlink(cr, uid, cash_ids, context=context)
         return self._update_order_lines(cr, uid, ids, context=context)
 
-    def _get_line_order_ids(self, cr, uid, ids, context=None):
-        """
-        return the list of lunch.order.lines ids to which belong the  lunch.order 'ids'
-        """
-        result = set()
-        for lunch_order in self.browse(cr, uid, ids, context=context):
-            for lines in lunch_order.order_line_ids:
-                result.add(lines.id)
-        return list(result)
-
-
     _columns = {
         'name': fields.related('product_id', 'name', readonly=True),
         'order_id': fields.many2one('lunch.order', 'Order', ondelete='cascade'),
         'product_id': fields.many2one('lunch.product', 'Product', required=True),
-        'date': fields.related('order_id', 'date', type='date', string="Date", readonly=True, store={
-            'lunch.order': (_get_line_order_ids, ['date'], 10),
-            }),
+        'date': fields.related('order_id', 'date', type='date', string="Date", readonly=True, store=True),
         'supplier': fields.related('product_id', 'supplier', type='many2one', relation='res.partner', string="Supplier", readonly=True, store=True),
         'user_id': fields.related('order_id', 'user_id', type='many2one', relation='res.users', string='User', readonly=True, store=True),
         'note': fields.text('Note'),
diff --git a/addons/lunch/tests/test_lunch.py b/addons/lunch/tests/test_lunch.py
index 79095f4504a..49e936848fe 100644
--- a/addons/lunch/tests/test_lunch.py
+++ b/addons/lunch/tests/test_lunch.py
@@ -20,7 +20,6 @@
 ##############################################################################
 
 from openerp import tools
-import time
 from openerp.tests import common
 
 class Test_Lunch(common.TransactionCase):
@@ -44,14 +43,12 @@ class Test_Lunch(common.TransactionCase):
         self.new_id_order = self.lunch_order.create(cr,uid,{
             'user_id': self.demo_id[0],
             'order_line_ids':'[]',
-            'date': time.strftime(tools.DEFAULT_SERVER_DATE_FORMAT),
             },context=None)
         self.new_id_order_line = self.lunch_order_line.create(cr,uid,{
             'order_id':self.new_id_order,
             'product_id':self.product_Bolognese_id,
             'note': '+Emmental',
             'cashmove': [],
-            'date': time.strftime(tools.DEFAULT_SERVER_DATE_FORMAT),
             'price': self.lunch_product.browse(cr,uid,self.product_Bolognese_id,context=None).price,
             })