I'm write code for python to inherit res.partner.

This code is when user click save button to update record, it will set state into draft (state = 'draft') if state = approved.

Any idea or clue to write this code?

class res_partner(models.Model):
    
    _inherit = 'res.partner'
    
    print "write procedure inherit awal"
    
    STATE_SELECTION = [
        ('draft', 'Draft'),
        ('approved', 'Approved'),

    ]
    state = fields.Selection(STATE_SELECTION, 'Status', readonly=True,
                                  help="Draft Record "
                                       "Approved Record. ",
                                  select=True,default='draft')

    def write(self, vals):
        if vals.get('state'):
            if vals.get('state')=='approved':
                state = 'draft'
    	return super(res_partner, self).write(vals)

it doesn't work.

Thanks.