first commit

modules/sale_subscription/product.py

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+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from trytond.model import fields
+from trytond.pool import PoolMeta
+from trytond.pyson import Eval, If
+
+
+class Product(metaclass=PoolMeta):
+    __name__ = 'product.product'
+
+    subscription_services = fields.One2Many(
+        'sale.subscription.service', 'product', "Subscription Services",
+        domain=[
+            If(~Eval('active'), ('active', '=', False), ()),
+            ],
+        states={
+            'invisible': Eval('type') != 'service',
+            })