Add margin in sale.report

sale_margin_no_onchange/sale_report.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+# Copyright 2018 Akretion (http://www.akretion.com)
+# @author Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class SaleReport(models.Model):
+    _inherit = 'sale.report'
+
+    margin = fields.Float(string='Margin', readonly=True)
+
+    def _select(self):
+        select_str = super(SaleReport, self)._select()
+        select_str += ", SUM(l.margin_company_currency) AS margin"
+        return select_str