Hello, i have a selection field in py as bellow
product = fields.selection([('box','Box'), ('carton','Carton')] 'Product')
in the view (xml file) it is inside table
<field name='product_ids'>
<tree string="Product_type" editable='bottom'>
<field name='product'/>
</tree>
</field>
how can i count how many 'box' selected in the table in qweb odoo report
thanks