[ADD]allow_negative_leave_and_allocation

allow_negative_leave_and_allocation/models/hr_leave.py

@@ -0,0 +1,16 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+# Copyright (c) 2005-2006 Axelor SARL. (http://www.axelor.com)
+
+from odoo import api, models
+
+class HrLeave(models.Model):
+    _inherit = "hr.leave"
+
+    @api.constrains('state', 'number_of_days', 'holiday_status_id')
+    def _check_holidays(self):
+        for holiday in self:
+            if holiday.holiday_status_id.allows_negative:
+                continue
+            super()._check_holidays()