but the update_state is not called in the state field
can I call the function as:
@api.depends('state')
def _get_contract_state(self):
self.search([
('state', '=', 'open'),
'|',
'&',
('date_end', '<=', fields.Date.to_string(date.today() + relativedelta(month=1))),
('date_end', '>=', fields.Date.to_string(date.today() + relativedelta(days=1))),
]).write({
'state': 'pending'
})
self.search([
('state', 'in', ('open', 'pending')),
'|',
('date_end', '<=', fields.Date.to_string(date.today() + relativedelta(days=1))),
('visa_expire', '<=', fields.Date.to_string(date.today() + relativedelta(days=1))),
]).write({
'state': 'close'
})

return True
state = fields.Selection([
('draft', 'New'),
('open', 'Running'),
('pending', 'To Renew'),
('close', 'Expired'),
('cancel', 'Cancelled')
], string='Status', compute='_get_contract_state', default='draft')

Its a scheduler, Running daily to update the contract
Activate Developer Mode
Goto Settings > Technical Settings>Scheduled Actions and search for 'HR Contract: Update State'

To change the state to 'Renew' before 30 days override update_state function and make changes