Question

在Node.js基本Web API中使用express-validator时

在CMD中

Visual representation of CMD error given below

C：\ Users \ Naman \ Node_React \ nodeapi \ app.js：31 * app.use（expressValidator（））; * ^ TypeError：expressValidator不是函数在对象。（C：\ Users \ Naman \ Node_React \ nodeapi \ app.js：31：9）在Module._compile（内部/模块/cjs/loader.js:1137:30）在Object.Module._extensions..js（内部/模块/cjs/loader.js:1157:10）在Module.load（internal / modules / cjs / loader.js：985：32）在Function.Module._load（内部/模块/cjs/loader.js:878:14）在Function.executeUserEntryPoint [作为runMain]（内部/模块/run_main.js:71:12）在internal / main / run_main_module.js：17：47 [nodemon]应用程序崩溃-等待文件更改，然后再开始...

在深入探讨主题之后，建议对回滚版本的“ express-validator”提出一些答案我做了然后回滚到 "express-validator": "^5.3.1",

CMD screenshot after rolling back to version 5.3.1

现在我陷入了另一个问题当我在POSTMAN上运行POST方法以检查错误检查功能是否正常工作时

CMD Error after rolling back to 5.3.1 POSTMAN error output

我仅将此函数称为2个文件，而

nodeapi/app.js

和

nodeapi/controllers/post.js

和文件

nodeapi / controllers / post.js

const Post = require('../models/post');
const { Result } = require('express-validator');


exports.getPosts = (req, res) => {
    res.json({
        posts : [
            {title: 'First Post'},
            {title: 'Second post'}
        ]
    });
};

exports.createPost = (req, res) => {
    const post = new Post(req.body);
    post.save().then(result => {
        res.status(200).json({
            post: result
        });
    });
};

nodeapi / app.js

const express = require('express');
const app = express();
const morgan = require("morgan");
const dotenv = require('dotenv');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const expressValidator = require('express-validator');
dotenv.config();

//DB

// This one also works Don't know HOW !!!
//const { MongoClient } = require("mongodb");
// const client = MongoClient.connect(process.env.MONGO_URI,{ useNewUrlParser: true, useUnifiedTopology: true },
//     console.log('DB Connected Succesfully'));
//OR
mongoose.connect(process.env.MONGO_URI, { useNewUrlParser: true, useUnifiedTopology: true})
   .then(() => console.log('DB Connectded Succesfully'));

mongoose.connection.on("error", err => {
    console.log(`DB Connection Error:, ${err.message}`);
});

// Bringing Routes
const postRoutes = require('./routes/post')


//Middleware
app.use(morgan('dev'));
app.use(bodyParser.json());
app.use(expressValidator());
app.use("/", postRoutes);


const port = process.env.PORT || 8080;
app.listen(port, () => {
    console.log(`A Node Js API is listening on port : ${port}`);
});

即使回滚到5.3.1后也会引发相同的错误，“ TypeError：req.valdationErrors不是函数”

0 个答案: