Knex instance failing to connect to PostgreSQL DB: Unhandled rejection Error: role "19016" doesn't exist

Question

我能够在 "knex-pracice"（我的 postgreql 数据库）与 KNEX 之间建立连接，但是当我尝试使用我的 knex 实例进行查询时，出现错误："Unhandled connection error: role " 19016“不存在”。 19016 是我的 WINDOWS 10 系统用户帐户的名称。我想弄清楚为什么它使用“19016”而不是指定的用户 "dunder-mifflin"。我是 postgres 和 knex 的新手，所以如果我的描述有点混乱或者我似乎完全误解了我的问题，请原谅我。

此外，我试图通过在数据库上创建一个名为“19016”的用户并尝试以这种方式连接来"hack"我的问题，但它只是给了我另一个错误："Unhandled connection error: database "19016”不存在”。完全不知道如何让它使用用户名 "dunder-mifflin" 连接到 postgresql 但是，我可以通过我的 powershell 连接并查询数据库，没有任何问题....

.env

NODE_ENV=development
PORT=8000 
DB_URL="postgresql://dunder-mifflin@localhost/knex-practice"

practice.js

//adds .env file for environment variable access
require('dotenv').config()
const knex = require('knex')

// database connection --> this connction comes from the .env file
const knexInstance = knex({
    client: 'pg',
    //   database connection established --> environment variable comes from .env
    // file
    connection: process.env.DB_URL 
})

console.log('connection successful');

// SQL query
knexInstance
    .from('amazong_products')
    .select('*')
    .then(result => {
        console.log(result)
    });

package.json

{
    "name": "knex-practice",
    "version": "1.0.0",
    "description": "knex-practice",
    "main": "index.js",
    "scripts": {
        "test": "mocha --require test/setup.js",
        "dev": "nodemon src/server.js",
        "start": "node src/practice.js",
        "predeploy": "npm audit",
        "deploy": "git push heroku master"
    },
    "repository": {
        "type": "git",
        "url": "git+https://github.com/quonn-bernard/Express-Boilerplate.git"
    },
    "keywords": [],
    "author": "",
    "license": "ISC",
    "bugs": {
        "url": "https://github.com/quonn-bernard/Express-Boilerplate/issues"
    },
    "homepage": "https://github.com/quonn-bernard/Express-Boilerplate#readme",
    "dependencies": {
        "cors": "^2.8.5",
        "dotenv": "^7.0.0",
        "express": "^4.16.4",
        "helmet": "^3.16.0",
        "knex": "^0.16.5",
        "morgan": "^1.9.1",
        "pg": "^7.9.0"
    },
    "devDependencies": {
        "chai": "^4.2.0",
        "mocha": "^6.0.2",
        "nodemon": "^1.18.10",
        "supertest": "^4.0.2"
    }
}

Answer 1

您需要将 connection string 更改为：

postgres://user:pass@localhost:5432/dbname

Knex instance failing to connect to PostgreSQL DB: Unhandled rejection Error: role "19016" doesn't exist

Knex instance failing to connect to PostgreSQL DB: Unhandled rejection Error: role "19016" doesn't exist

node.js

knex.js

postgresql-11