asset: einheit als währung/menge

asset.py

@@ -46,6 +46,8 @@ class Asset(ModelSQL, ModelView):
         domain=[
             ('category', '=', Eval('product_uom')),
         ], depends=['product_uom', 'product'])
+    uom_symbol = fields.Function(fields.Char(string='UOM', readonly=True),
+        'on_change_with_uom_symbol', searcher='search_uom_symbol')
     rates = fields.One2Many(string='Rates', field='asset',
         model_name='investment.rate')
     rate = fields.Function(fields.Numeric(string='Current Rate',
@@ -259,6 +261,24 @@ class Asset(ModelSQL, ModelView):
                 if self.company.currency.id != self.currency.id:
                     return self.company.currency.id
 
+    @fields.depends('uom', 'currency')
+    def on_change_with_uom_symbol(self, name=None):
+        """ get symbl of uom
+        """
+        return '%(currency)s/%(unit)s' % {
+            'currency': self.currency.symbol if self.currency is not None else '-',
+            'unit': self.uom.symbol if self.uom is not None else '-',
+            }
+
+    @classmethod
+    def search_uom_symbol(cls, names, clause):
+        """ search in uom
+        """
+        return ['OR',
+                (('uom.rec_name',) + tuple(clause[1:])),
+                (('currency.rec_name',) + tuple(clause[1:])),
+            ]
+
     @classmethod
     def get_rate_data_sql(cls):
         """ get sql for rate/date