Capacity to product.product and set calculation

product.py

@@ -46,19 +46,6 @@ class Template(metaclass=PoolMeta):
         states={
             'invisible': Eval('agronomic_type') != 'bottled-wine',
         }, depends=['agronomic_type'])
-    capacity = fields.Function(fields.Numeric('Capacity', digits=(16, 2),
-        states={
-            'invisible': Eval('agronomic_type') != 'bottled-wine',
-        }, depends=['agronomic_type']), 'get_capacity',
-        searcher='search_capacity')
-
-    def get_capacity(self, name):
-        if self.container:
-            return self.container.capacity
-
-    @classmethod
-    def search_capacity(cls, name, clause):
-        return [('container.capacity',) + tuple(clause[1:])]
 
 
 class Product(WineMixin, metaclass=PoolMeta):
@@ -97,6 +84,14 @@ class Product(WineMixin, metaclass=PoolMeta):
                 ['wine', 'unfiltered-wine', 'filtered-wine', 'clarified-wine',
                     'bottled-wine']
             )}, depends=['agronomic_type'])
+    capacity = fields.Function(fields.Numeric('Capacity', digits=(16, 2),
+        states={
+            'invisible': Eval('agronomic_type') != 'bottled-wine',
+        }, depends=['agronomic_type']), 'get_capacity')
+
+    def get_capacity(self, name):
+        if self.template.container and self.wine_alcohol_content:
+            return (self.template.container.capacity * self.wine_alcohol_content) / 100
 
     @classmethod
     def validate(cls, products):

view/template_form.xml

@@ -4,7 +4,5 @@
         <field name="agronomic_type"/>
         <label name="container"/>
         <field name="container"/>
-        <label name="capacity"/>
-        <field name="capacity"/>
     </xpath>
 </data>

view/template_list.xml

@@ -2,6 +2,5 @@
     <xpath expr="/tree" position="inside">
         <field name="agronomic_type" tree_invisible="1"/>
         <field name="container" tree_invisible="1"/>
-        <field name="capacity" tree_invisible="1"/>
     </xpath>
 </data>