it's not working for form view.

Actually i want to refresh a form view when i remove some attachment, so for that reason i have override unlink() of attachment and in that i have written:

super(IrAttachment, rec).unlink()

return { 'type' : 'ir.actions.act_close_wizard_and_reload_view' }

return {'type': 'ir.actions.client','tag': 'reload',}

return {

'res_id': 1,

'view_id': self.env.ref('invoice_ocr.view_ocr_import_form').id,

'view_type': 'form',

'view_mode': 'form',

'res_model': model_name,

'type': 'ir.actions.act_window',

'target': 'new',

}

i have tried using all above return method but still it's not working, can you suggest??