问题描述
我的Webstorm中有一个Node / React项目，由于该错误而无法运行。我必须重新安装Windows并重新开始开发。我将代码重新输入到IDE中，但是当我启动节点服务器时，出现以下错误：TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
该错误的更多上下文：
[nodemon] starting `babel-node src/node-server/index.js`
internal/validators.js:122
throw new ERR_INVALID_ARG_TYPE(name,'string',value);
^
TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
at validateString (internal/validators.js:122:11)
at Object.join (path.js:375:7)
at Object.<anonymous> (C:\Projects\Production-orchestrator\src\node-server\/index.js:17:15)
我去了index.js，这是第1-17行：
// npm run server
import dotenv from 'dotenv';
import express from 'express';
import path from 'path';
import sql from 'mssql';
import cors from 'cors';
import http from 'http';
import { setupWebSocket } from './ws/setupWebSocket.js';
const useWebSockets = true;
dotenv.config();
const dbConfig = {
user: process.env.DB_USER,password: process.env.DB_PASS,server: path.join(process.env.DB_SERVER,process.env.DB_HOST),我正在运行npm run server来启动节点服务器。
如果有帮助，这是我的package.json：
{
"name": "my-app","version": "0.1.0","private": true,"description": "my app","homepage": ".","repository": {
"type": "git","url": "git+https://github.com/xxxxxxx"
},"license": "UNLICENSED","scripts": {
"buildp": "env-cmd -f .env.production react-scripts build","buildt": "env-cmd -f .env.test react-scripts build","buildw": "webpack --config ./webpack.config.js --mode production","eject": "react-scripts eject","eslint-check": "eslint --print-config src/components/search/Search.js | eslint-config-prettier-check","server": "nodemon --exec babel-node src/node-server/index.js","start": "SET REACT_APP_WS_PORT=3001 & react-scripts start","startw": "webpack-dev-server --config ./webpack.config.js --mode development --open","stylelint": "stylelint **/*.scss","test": "react-scripts test","ws": "node --experimental-modules src/node-server/websocket.js","ws2": "nodemon --exec babel-node src/node-server/websocket.js"
},"browserslist": {
"production": [
">0.2%","not dead","not op_mini all"
],"development": [
"last 1 chrome version","last 1 firefox version","last 1 safari version"
]
},"dependencies": {
"@babel/preset-react": "^7.8.0","@emotion/core": "latest","@fortawesome/fontawesome": "^1.1.8","@fortawesome/fontawesome-svg-core": "^1.2.27","@fortawesome/free-regular-svg-icons": "^5.12.1","@fortawesome/free-solid-svg-icons": "^5.12.1","@fortawesome/react-fontawesome": "^0.1.8","@popperjs/core": "^2.0.6","@react-pdf/renderer": "^1.6.8","@types/react": "^16.9.19","animate.css": "^3.7.2","axios": "^0.19.2","babel-loader": "^8.0.6","bootstrap": "^4.4.1","bufferutil": "^4.0.1","cors": "^2.8.5","dayjs": "^1.8.20","device-detector-js": "^2.2.1","dotenv": "^8.2.0","express": "^4.17.1","express-ws": "^4.0.0","file-saver": "^2.0.2","javascript-time-ago": "latest","jquery": "^3.4.1","jsbarcode": "^3.11.0","mssql": "^6.1.0","popper.js": "^1.16.1","print-js": "^1.0.63","prop-types": "^15.7.2","react": "^16.12.0","react-animations": "^1.0.0","react-beautiful-dnd": "^12.2.0","react-beforeunload": "^2.2.1","react-collapse": "^5.0.1","react-confirm-alert": "^2.6.1","react-custom-scrollbars": "^4.2.1","react-detect-offline": "^2.4.0","react-dnd": "^10.0.2","react-dnd-html5-backend": "^10.0.2","react-dom": "^16.12.0","react-modal": "^3.11.1","react-notifications-component": "^2.3.0","react-popup": "^0.10.0","react-radio-group": "^3.0.3","react-router-dom": "^5.1.2","react-scripts": "^3.4.3","react-select": "^3.0.8","react-spinners": "^0.8.0","react-spring": "^8.0.27","react-time-ago": "^5.0.7","react-transition-group": "^4.3.0","sort-package-json": "^1.40.0","styled-components": "^4.4.1","typescript": "^3.7.5","utf-8-validate": "^5.0.2","ws": "^7.2.5"
},"devDependencies": {
"@babel/cli": "^7.8.4","@babel/core": "^7.8.4","@babel/node": "^7.10.5","@babel/preset-env": "^7.8.4","@welldone-software/why-did-you-render": "^4.2.5","css-loader": "^3.4.2","dotenv-cli": "^3.2.0","env-cmd": "^10.1.0","eslint": "^6.8.0","eslint-config-prettier": "^6.10.0","eslint-loader": "^3.0.3","eslint-plugin-babel": "^5.3.0","eslint-plugin-prettier": "^3.1.2","file-loader": "^5.0.2","html-loader": "^0.5.5","html-webpack-plugin": "^3.2.0","node-sass": "^4.13.1","nodemon": "^2.0.4","prettier": "^1.19.1","react-hot-loader": "^4.12.19","sass-loader": "^8.0.2","stylelint": "^13.2.0","stylelint-config-rational-order": "^0.1.2","stylelint-config-standard": "^19.0.0","stylelint-order": "^4.0.0","stylelint-scss": "^3.14.2","url-loader": "^3.0.0","webpack": "^4.44.1","webpack-cli": "^3.3.11"
},"proxy": "http://localhost:3000"
}
解决方法
好的，我知道了问题所在。我以为错误告诉我path未定义。事实上，这是说传递给path.join()的变量是未定义的。那是因为我忘记将.env文件添加到根目录中，因此它可以捕获这些变量。哎呀！
更新 package.json 文件中的所有 npm。它对我有用。