Add module account_invoice_sale_link.

account_invoice_sale_link/account_invoice.py

@@ -0,0 +1,36 @@
+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    Account Invoice Sale Link module for OpenERP
+#    Copyright (C) 2013 Akretion (http://www.akretion.com)
+#    @author Alexis de Lattre <alexis.delattre@akretion.com>
+#
+#    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.osv import orm, fields
+
+
+class account_invoice(orm.Model):
+    _inherit = 'account.invoice'
+
+    _columns = {
+        # This is the reverse link of the field 'invoice_ids' of sale.order
+        # defined in addons/sale/sale.py
+        'sale_ids': fields.many2many(
+            'sale.order', 'sale_order_invoice_rel', 'invoice_id',
+            'order_id', 'Sale Orders', readonly=True,
+            help="This is the list of sale orders related to this invoice."),
+        }