Postgres 数据库连接在 node.js 中不起作用

Question

我正在尝试使用 node-postgres 包连接我的数据库 postgres，但我的连接不工作。我设置了需要建立连接的每个参数，即使设置了所有参数，我也没有在日志中收到数据库已连接的消息。我错过了什么？

我的代码：

const { Pool } = require('pg');
const dotenv = require('dotenv');
dotenv.config();
const express = require('express');
const app = express(); 
const pool = new Pool({
    user: 'postgres',
    host: 'localhost',
    database: 'clinica-veterinaria',
    password: 'admin',
    port: 5432,
  })

pool.on('connect',() => {
    console.log('Conexão estabelecida com sucesso')
});

module.exports = {
    query: (text,params) => pool.query(text,params),
}
const flash = require('connect-flash');

const routes = require('./routes')
const path = require('path');


app.use(express.urlencoded({  extended:true }));

app.use(express.static(path.resolve(__dirname, 'public')));

app.use(flash());

app.set('views', path.resolve(__dirname, 'src', 'views'));
app.set('view engine', 'ejs');

app.use(routes);

app.listen(3000, () => {
    console.log('Acessar http://localhost:3000');
    console.log('Servidor executando na porta 3000');
});

Answer 1

虽然您创建了池，但我没有看到您连接到 Postgre 服务器。更多信息请查看this document。

试试这个：

const pool = new Pool({
    user: 'postgres',
    host: 'localhost',
    database: 'clinica-veterinaria',
    password: 'admin',
    port: 5432,
});

pool.connect((err, client, release) => {
    if (err) {
        return console.error('Error acquiring client', err.stack)
    }
    // Do what you have to do with the pool client now
}