Partner()
+class Product(osv.osv):
+ _inherit = 'product.product'
+
+ _columns = {
+ 'membership_grouped': fields.boolean('Grouped membership product', help='Check if it\'s a grouped membership product.'),
+ 'membership_date2date': fields.boolean('Date to date membership product', help='Check if it\'s a date to date membership product.'),
+ }
+
+Product()
+
+
class account_invoice_line(osv.osv):
_inherit = 'account.invoice.line'