Initial import from Docker volume

modules/sale_subscription/invoice.py

@@ -0,0 +1,22 @@
+# 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.pool import Pool, PoolMeta
+
+
+class InvoiceLine(metaclass=PoolMeta):
+    __name__ = 'account.invoice.line'
+
+    @property
+    def origin_name(self):
+        pool = Pool()
+        SubscriptionLine = pool.get('sale.subscription.line')
+        name = super(InvoiceLine, self).origin_name
+        if isinstance(self.origin, SubscriptionLine):
+            name = self.origin.subscription.rec_name
+        return name
+
+    @classmethod
+    def _get_origin(cls):
+        models = super(InvoiceLine, cls)._get_origin()
+        models.append('sale.subscription.line')
+        return models