ADD contract_invoices_module module

contract_show_invoice/models/invoice.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+
+from openerp import models, fields, api
+
+
+class AccountInvoice(models.Model):
+    _inherit = 'account.invoice'
+
+    @api.one
+    @api.depends('invoice_line.account_analytic_id')
+    def _analytic_account_ids(self):
+        self.analytic_account_ids = \
+            self.mapped('invoice_line.account_analytic_id')
+
+    analytic_account_ids = fields.Many2many(
+        comodel_name='account.analytic.account',
+        compute='_analytic_account_ids',
+        store=True,
+        string='Contracts')