类型错误:无法读取未定义的属性“数据库" [英] TypeError: Cannot read property 'database' of undefined

问题描述

我有两个文件-config.js 和 index.js我写的代码如下-

I have two files-config.js and index.js The code I have written is as follows-

config.js-

module.exports={
    port:process.env.PORT || 8081,
    db:{
        database:process.env.DB_NAME|| 'tabtracker',
        user:process.env.DB_USER || 'tabtracker',
        password:process.env.DB_PASS|| 'tabtracker',
        options:{
            dialect:process.env.DIALECT ||'sqlite',
            host:process.env.HOST ||'localhost', 
            storage:'./tabtracker.sqlite'

        }
    }
}

index.js-

const fs=require('fs')
const path=require('path')
const Sequelize=require('sequelize')
const config=require('../config/config')
const db={}


const sequelize=new Sequelize(

    config.db.database,
    config.db.password,
    config.db.user,
    config.db.options
)


fs.readdirSync(__dirname)
 .filter((file)=>{
     file!=='index.js'
 }
 )
.forEach(file=>{
    const model=sequelize.import(path.join(__dirname,file));
    db[model.name]=model
})

db.sequelize=sequelize
db.Sequelize=Sequelize
module.exports=db

为什么会抛出错误?我已经在 index.js 中正确导入了 config.js.我也正确地声明了配置文件.

Why it is throwing error? I have imported the config.js properly in index.js. I have also declared config file properly.

推荐答案

const config=('../config/config') - 没有 require 关键字这里.所以 config 不是你的配置，只是右边的一个字符串.因此访问undefined的属性，即config.db.

const config=('../config/config') - there is no require keyword here. So the config is not your config, just a string on the right. Hence accessing property of undefined, which is config.db.

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