[FIX] hr_attendance: correct datetime format on warning

Before this Commit, Datetime on warning was not formatted based on User's lang.

With this commit, we use `format_datetime` to correctly format Datetime.

addons/hr_attendance/models/hr_attendance.py

@@ -2,6 +2,7 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from odoo import models, fields, api, exceptions, _
+from odoo.tools import format_datetime
 
 
 class HrAttendance(models.Model):
@@ -69,7 +70,7 @@ class HrAttendance(models.Model):
             if last_attendance_before_check_in and last_attendance_before_check_in.check_out and last_attendance_before_check_in.check_out > attendance.check_in:
                 raise exceptions.ValidationError(_("Cannot create new attendance record for %(empl_name)s, the employee was already checked in on %(datetime)s") % {
                     'empl_name': attendance.employee_id.name,
-                    'datetime': fields.Datetime.to_string(fields.Datetime.context_timestamp(self, fields.Datetime.from_string(attendance.check_in))),
+                    'datetime': format_datetime(self.env, attendance.check_in, dt_format=False),
                 })
 
             if not attendance.check_out:
@@ -82,7 +83,7 @@ class HrAttendance(models.Model):
                 if no_check_out_attendances:
                     raise exceptions.ValidationError(_("Cannot create new attendance record for %(empl_name)s, the employee hasn't checked out since %(datetime)s") % {
                         'empl_name': attendance.employee_id.name,
-                        'datetime': fields.Datetime.to_string(fields.Datetime.context_timestamp(self, fields.Datetime.from_string(no_check_out_attendances.check_in))),
+                        'datetime': format_datetime(self.env, no_check_out_attendances.check_in, dt_format=False),
                     })
             else:
                 # we verify that the latest attendance with check_in time before our check_out time
@@ -95,7 +96,7 @@ class HrAttendance(models.Model):
                 if last_attendance_before_check_out and last_attendance_before_check_in != last_attendance_before_check_out:
                     raise exceptions.ValidationError(_("Cannot create new attendance record for %(empl_name)s, the employee was already checked in on %(datetime)s") % {
                         'empl_name': attendance.employee_id.name,
-                        'datetime': fields.Datetime.to_string(fields.Datetime.context_timestamp(self, fields.Datetime.from_string(last_attendance_before_check_out.check_in))),
+                        'datetime': format_datetime(self.env, last_attendance_before_check_out.check_in, dt_format=False),
                     })
 
     @api.returns('self', lambda value: value.id)