I want to redirect user an external url in a function then open another kanban view at the same function how can i do this ?

for example ;

def go_to_approval(self):
    return {
        'type': 'ir.actions.act_url',
        'target': 'new',
        'url': self.email_approval_url,
    }

Then 
return {
    'name': _('Bla Bla Details'),
    'type': 'ir.actions.act_window',
    'view_mode': 'form',
    'res_model': 'example.detail',
    'res_id': created_detail_id.id,
    'target': 'current'
}