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modules/edocument_ubl/account.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
+
+
+class InvoiceEdocumentStart(metaclass=PoolMeta):
+    __name__ = 'account.invoice.edocument.start'
+
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        cls.format.selection.append(
+            ('edocument.ubl.invoice', "UBL"))
+
+    @fields.depends('format')
+    def get_templates(self):
+        templates = super().get_templates()
+        if self.format == 'edocument.ubl.invoice':
+            templates.append(('2', '2'))
+        return templates