TypeError: require(…) is not a function Express.js

Question

I need help. I have this error when I run npm start:

/Users/telecreative/Documents/cafemates micro-services/cafemates-users-services/database/index.js:8
const pgp = require("pg-promise")(options)                                 ^

On another computer, script running, with node version and npm version was same:

TypeError: require(...) is not a function

 const express = require("express") const app = express() require('dotenv').config({path:__dirname+'/./../../.env'}) const promise = require("bluebird") const options = { promiseLib: promise } const pgp = require("pg-promise")(options) const config = { user: process.env.DATABASE_USER, host: process.env.DATABASE_HOST, database: process.env.DATABASE, password: process.env.DATABASE_PASSWORD, port: process.env.DATABASE_PORT } const db = pgp(config); module.exports = db 

Answer 1

尝试从项目根目录运行npm install --save pg-promise bluebird ，然后重新加载该应用程序。

Answer 2

This: require("pg-promise") simple does not return function.

Therefore when you use require("pg-promise")(...) it tries to use it as function and then fails, because it is not a function.

You can try console.log(require("pg-promise"))) to see whats inside.

Answer 3

解决了我的问题，我从现有的json包中复制了json包。最好的方法应该是一一安装。