[12.0][ADD] - Add new module Contract Transmit Method

contract_transmit_method/models/contract_contract.py

@@ -0,0 +1,16 @@
+# Copyright 2020 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, models
+
+
+class ContractContract(models.Model):
+
+    _inherit = "contract.contract"
+
+    @api.multi
+    def _prepare_invoice(self, date_invoice, journal=None):
+        invoice_vals = super()._prepare_invoice(date_invoice, journal=journal)
+        if self.transmit_method_id:
+            invoice_vals["transmit_method_id"] = self.transmit_method_id.id
+        return invoice_vals