Add bypass invoice policy following change on odoo#6931

stock_dropshipping_dual_invoice/model/__init__.py

@@ -1,3 +1,4 @@
 # -*- coding: utf-8 -*-
 from . import move
 from . import picking
+from . import purchase_order

stock_dropshipping_dual_invoice/model/purchase_order.py

@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+#
+#    Author: Yannick Vaucher
+#    Copyright 2015 Camptocamp SA
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+from openerp import models, api
+
+
+class PurchaseOrder(models.Model):
+    _inherit = 'purchase.order'
+
+    @api.multi
+    def wkf_confirm_order(self):
+        po = self.with_context(no_invoice_policy_check=True)
+        super(PurchaseOrder, po).wkf_confirm_order()