[IMP] Add pos margin in pos order report

pos_margin/__init__.py

@@ -1 +1,2 @@
 from . import models
+from . import report

pos_margin/report/__init__.py

@@ -0,0 +1,2 @@
+from . import pos_order_report
+

pos_margin/report/pos_order_report.py

@@ -0,0 +1,15 @@
+from odoo import fields, models
+
+
+class PosOrderReport(models.Model):
+    _inherit = 'report.pos.order'
+
+    margin_total = fields.Float(string='Margin Total')
+    margin_rate = fields.Float(string='Margin Rate', group_operator='avg')
+
+    def _select(self):
+        return super(PosOrderReport, self)._select() + """,
+    SUM(l.margin) as margin_total,
+    (SUM(l.margin / nullif(l.qty,0)) * 100 /
+    SUM(nullif(l.purchase_price,0)))::decimal as margin_rate
+    """