Javascript 发布到MongoDB,我做错了什么?
我试图向MongoDB发布一个新条目,我知道这个问题是我在服务器文件中调用路由的地方,但我不知道如何解决这个问题。我需要能够在postman中测试API并将其发布到数据库 我收到以下错误: /Users/ryan/Desktop/leasequery/operations backend/node_modules/express/lib/router/index.js:458 抛出新的TypeError('Router.use()需要一个中间件函数,但得到了'+gettype(fn)) ^ TypeError:Router.use()需要一个中间件函数,但得到了一个对象 在Function.use(/Users/ryan/Desktop/leasequery/operations backend/node_modules/express/lib/router/index.js:458:13) 在功能上。(/Users/ryan/Desktop/leasequery/operations backend/node_modules/express/lib/application.js:220:21) 在Array.forEach()处 在Function.use(/Users/ryan/Desktop/leasequery/operations backend/node_modules/express/lib/application.js:217:7) 反对。(/Users/ryan/Desktop/leasequery/operations backend/server.js:12:5) at模块编译(内部/modules/cjs/loader.js:778:30) at Object.Module._extensions..js(internal/modules/cjs/loader.js:789:10) at Module.load(内部/modules/cjs/loader.js:653:32) 在tryModuleLoad(内部/modules/cjs/loader.js:593:12) at Function.Module._load(内部/modules/cjs/loader.js:585:3) 位于Function.Module.runMain(internal/modules/cjs/loader.js:831:12) 启动时(内部/bootstrap/node.js:283:19) 在bootstrapNodeJSCore(internal/bootstrap/node.js:622:3) [nodemon]应用程序崩溃-正在等待文件更改,然后再启动 我使用的是中间件(express validator) server.jsJavascript 发布到MongoDB,我做错了什么?,javascript,node.js,reactjs,mongodb,express,Javascript,Node.js,Reactjs,Mongodb,Express,我试图向MongoDB发布一个新条目,我知道这个问题是我在服务器文件中调用路由的地方,但我不知道如何解决这个问题。我需要能够在postman中测试API并将其发布到数据库 我收到以下错误: /Users/ryan/Desktop/leasequery/operations backend/node_modules/express/lib/router/index.js:458 抛出新的TypeError('Router.use()需要一个中间件函数,但得到了'+gettype(fn)) ^ Ty
const express = require("express");
const connectDB = require("./config/db");
const app = express();
connectDB();
app.use(express.json({ extended: false }));
app.get("/", (req, res) => res.json({ msg: "Welcome to Operations" }));
app.use("/api/status", require("./routes/status"));
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => console.log(`Server listening on Port ${PORT}`));
routes/status.js
const express = require("express");
const router = express.Router();
const { check, validationResult } = require("express-validator");
const Status = require("../models/Status");
router.post(
"/",
[
check("name", "Please Add Name")
.not()
.isEmpty(),
check("date", "Please add date")
.not()
.isEmpty(),
check("comment", "Please add comment")
.not()
.isEmpty()
],
async (req, res) => {
const errors = validationResult(req);
if (!errors.isEmpty()) {
return res.status(400).json({ errors: errors.array() });
}
const { name, date, comment } = req.body;
try {
entry = new Entry({
name,
date,
comment
});
await entry.save();
} catch (err) {
console.error(err.message);
res.status(500).send("Server Error...");
}
}
);
const router = express.Router();
const { check, validationResult } = require("express-validator");
const Status = require("../models/Status");
router.post(
"/",
[
check("name", "Please Add Name")
.not()
.isEmpty(),
check("date", "Please add date")
.not()
.isEmpty(),
check("comment", "Please add comment")
.not()
.isEmpty()
],
async (req, res) => {
const errors = validationResult(req);
if (!errors.isEmpty()) {
return res.status(400).json({ errors: errors.array() });
}
const { name, date, comment } = req.body;
try {
entry = new Entry({
name,
date,
comment
});
await entry.save();
} catch (err) {
console.error(err.message);
res.status(500).send("Server Error...");
}
}
);
module.exports = router;
models/Status.js
const mongoose = require("mongoose");
const StatusSchema = mongoose.Schema({
name: {
type: String,
required: true
},
date: {
type: Date,
required: true
},
comment: {
type: String,
required: true
}
});
module.exports = mongoose.model("status", StatusSchema);
routes/status.js
const express = require("express");
const router = express.Router();
const { check, validationResult } = require("express-validator");
const Status = require("../models/Status");
router.post(
"/",
[
check("name", "Please Add Name")
.not()
.isEmpty(),
check("date", "Please add date")
.not()
.isEmpty(),
check("comment", "Please add comment")
.not()
.isEmpty()
],
async (req, res) => {
const errors = validationResult(req);
if (!errors.isEmpty()) {
return res.status(400).json({ errors: errors.array() });
}
const { name, date, comment } = req.body;
try {
entry = new Entry({
name,
date,
comment
});
await entry.save();
} catch (err) {
console.error(err.message);
res.status(500).send("Server Error...");
}
}
);
const router = express.Router();
const { check, validationResult } = require("express-validator");
const Status = require("../models/Status");
router.post(
"/",
[
check("name", "Please Add Name")
.not()
.isEmpty(),
check("date", "Please add date")
.not()
.isEmpty(),
check("comment", "Please add comment")
.not()
.isEmpty()
],
async (req, res) => {
const errors = validationResult(req);
if (!errors.isEmpty()) {
return res.status(400).json({ errors: errors.array() });
}
const { name, date, comment } = req.body;
try {
entry = new Entry({
name,
date,
comment
});
await entry.save();
} catch (err) {
console.error(err.message);
res.status(500).send("Server Error...");
}
}
);
module.exports = router;
很高兴你能找到答案。请注意,离开模型方法以简化代码:(create、updateOne、deleteOne等)您是否碰巧知道如何格式化日期,使其保存到数据库中为“MM/DD/YYYY”。默认情况下,mongo将日期存储为BSON:。如果要以特定格式存储日期,则除了使用
日期
(这样您仍然可以查询该日期)外,还可以使用字符串
类型。