初级开发人员。
我正在测试我的API。我在MySQL上使用Node v18、Express v4和Sequelize v6。
我的config.js

require('dotenv').config();
const { DB_NAME, DB_USERNAME, DB_PASSWORD, HOST } = process.env;

module.exports = {
  development: {
    "username": DB_USERNAME,
    "password": DB_PASSWORD,
    "database": DB_NAME,
    "host": HOST,
    "dialect": "mysql",
    pool: {
      max: 5,
      min: 0,
      acquire: 30000,
      idle: 10000
    }
  },
  staging: {
    "username": DB_USERNAME,
    "password": DB_PASSWORD,
    "database": DB_NAME,
    "host": HOST,
    "dialect": "mysql",
    pool: {
      max: 5,
      min: 0,
      acquire: 30000,
      idle: 10000
    }
  },
  "production": {
    "username": "root",
    "password": null,
    "database": "database_production",
    "host": "127.0.0.1",
    "dialect": "mysql"
  }
}

这是我的模型index.js

const { Sequelize, DataTypes } = require('sequelize');
const env = process.env.NODE_ENV || "development";
const config = require('../../../config/config.js')[env];

const sequelize = new Sequelize(
    config.database, config.username, config.password, {
        host: config.host,
        dialect:config.dialect,
        operatorsAliases: false,
        pool: {
            max: config.pool.max,
            min: config.pool.min,
            acquire: config.pool.acquire,
            idle: config.pool.idle
        },
        port: 3306
    }
)

sequelize.authenticate()
    .then(() => {
        console.log(`Database connected 🥳`)
    })
    .catch(err => {
        console.error(`Error: `, err)
    })

const db = {}

db.Sequelize = Sequelize
db.sequelize = sequelize

db.abouts = require('./abouts')(sequelize, DataTypes);
db.clients = require('./clients')(sequelize, DataTypes);
db.address = require('./address')(sequelize, DataTypes);
db.career = require('./career')(sequelize, DataTypes);

module.exports = db

它在开发中运行良好。但是，在暂存时，它会抛出“No database selected”Table schema is null
我已经检查了所有的文档和解决方案，没有一个有效。迁移和播种工作除此之外。.env上的变量命名正确，没有拼写错误。