javascript - 如何在 DELETE 路由中发送消息 - express.js

Question

我想在删除用户后显示消息，但我不知道该怎么做。我尝试创建 req.session 属性然后使用它们，但它们在 GET 路由中不可用。您知道如何修复此代码吗？

router.get("/", mid.isExpired, mid.isLoggedIn, mid.isAdmin, (req, res) => {
  let currentMessage = req.session.message;
  let currentState = req.session.state;
  req.session.message = undefined;
  req.session.state = undefined;
  console.log(currentState, currentMessage); //undefined
  user.getAll()
    .then(result => {
      res.render("users", {
        name: req.user,
        users: result,
        msg: currentMessage,
        state: currentState
      })
    })
});


// delete route

router.delete("/delete/:id", mid.isExpired, mid.isLoggedIn, mid.isAdmin, (req, res) => {
  user.del(req.params.id)
    .then(() => {
      req.session.message = "Some message!"
      req.session.state = true;
    })
});

// jquery 

function ajaxDelete(ev, url) {
  ev.preventDefault();
  $.ajax({
    url: url,
    type: "DELETE"
  });
}

delBtn.click(function(e) {
  var user = $(this).data("user");
  ajaxDelete(e, "/users/delete/" + user);
  window.location.href = "/users";
})

Answer 1

使用res参数，创建一个名为message的变量

const message= 'MyMessage';

然后

res.json ({message}) // es6 feature

输出

{"message":"myMessage"}