Question

试图从localhost：3000 / todos /在mongodb中创建数据后尝试获取数据，并且在节点[UnhandledPromiseRejectionWarning]中收到错误：错误[ERR_HTTP_HEADERS_SENT]：在将标头发送到客户端后无法设置标头]以下

// Require Express
const express = require("express");

// Setting Express Routes
const router = express.Router();

// Set Up Models
const Todo = require("../models/todo");

// Get All Todos
router.get("/", async (req, res) => {
  try {
    const todo = await Todo.find();
    res.json(todo);
  } catch (err) {
    res.json({ message: err });
  }
});

这是我的app.js，具有到localhost：3000 / todos /

的必要路由

// Require Express
const express = require("express");
const app = express();

// Require Body-Parser
const bodyParser = require("body-parser");

// Require Cors
const cors = require("cors");

// Middlewares - [Set bodyParser before calling routes]
app.use(cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

// Import Routes
const todoRoutes = require("./routes/todo");

// Setup Routes Middlewares
app.use("/", todoRoutes);
app.use("/todos", todoRoutes);

我想看到我在localhost：3000 / todos /上的输出数据，但我在localhost：3000 /上得到了它。谢谢

Answer 1

好吧，我不知所措，这是我的路线导致的，我只是调整了路线的指向。

// Import Routes
const todoRoutes = require("./routes/todo");

// Setup Routes Middlewares
app.use("/todos", todoRoutes);

快速获得请求中解决UnhandledPromiseRejectionWarning

1 个答案: