[FIX] hr_attendance: generated unique kiosk key for every company

This issue occurs when a customer creates multiple companies. Then, after
installing the attendance module, after selecting the kiosk mode, an error
is generated. This is because, before installing the attendance module,
if the customer created a company, a single kiosk key is generated. This
key is different for each company, but it is the same.

step to reproduce-
- First created two company.
- Install the `Attendances` & Open it.
- Click on the Kiosk Mode from Menu.
- Error will be generated.

Error-ValueError
      Expected singleton: res.company(2, 1, 4, 3)

after this commit,Each attendance kiosk key generated during the company's
creation is unique.

sentry-4617967282

closes odoo/odoo#145382

Signed-off-by: Sofie Gvaladze (sgv) <sgv@odoo.com>

addons/hr_attendance/models/res_company.py

@@ -10,6 +10,9 @@ from werkzeug.urls import url_join
 class ResCompany(models.Model):
     _inherit = 'res.company'
 
+    def _default_company_token(self):
+        return str(uuid.uuid4())
+
     hr_attendance_overtime = fields.Boolean(string="Count Extra Hours")
     overtime_start_date = fields.Date(string="Extra Hours Starting Date")
     overtime_company_threshold = fields.Integer(string="Tolerance Time In Favor Of Company", default=0)
@@ -36,6 +39,29 @@ class ResCompany(models.Model):
         for company in self:
             company.attendance_kiosk_url = url_join(company.get_base_url(), '/hr_attendance/%s' % company.attendance_kiosk_key)
 
+    # ---------------------------------------------------------
+    # ORM Overrides
+    # ---------------------------------------------------------
+    def _init_column(self, column_name):
+        """ Initialize the value of the given column for existing rows.
+            Overridden here because we need to generate different access tokens
+            and by default _init_column calls the default method once and applies
+            it for every record.
+        """
+        if column_name != 'attendance_kiosk_key':
+            super(ResCompany, self)._init_column(column_name)
+        else:
+            self.env.cr.execute("SELECT id FROM %s WHERE attendance_kiosk_key IS NULL" % self._table)
+            attendance_ids = self.env.cr.dictfetchall()
+            values_args = [(attendance_id['id'], self._default_company_token()) for attendance_id in attendance_ids]
+            query = """
+                UPDATE {table}
+                SET attendance_kiosk_key = vals.token
+                FROM (VALUES %s) AS vals(id, token)
+                WHERE {table}.id = vals.id
+            """.format(table=self._table)
+            self.env.cr.execute_values(query, values_args)
+
     def write(self, vals):
         search_domain = False  # Overtime to generate
         delete_domain = False  # Overtime to delete