rates: speichert kurse

asset.py

@@ -30,6 +30,8 @@ class Asset(ModelSQL, ModelView):
         domain=[
             ('category', '=', Eval('product_uom')),
         ], depends=['product_uom', 'product'])
+    rates = fields.One2Many(string='Rates', field='asset',
+        model_name='investment.rate')
 
     company_currency = fields.Function(fields.Many2One(readonly=True,
         string='Company Currency', states={'invisible': True},
@@ -72,9 +74,9 @@ class Asset(ModelSQL, ModelView):
 
     @classmethod
     def default_currency_digits(cls):
-        """ default: 2
+        """ default: 4
         """
-        return 2
+        return 4
 
     @fields.depends('product', 'uom')
     def on_change_product(self):