nodejs sequelize连接字符串中的异步等待问题

Question

function credential(secretFromVault) {
  const creddetails = new ClientSecretCredential(clientId, tenantId, cleintSecret);
  // Build the URL to reach your key vault
  const url = `https://<vaultName>.vault.azure.net/`;

  // Lastly, create our secrets client and connect to the service
  const client = new SecretClient(url, creddetails);

  const secretName = secretFromVault;
  return new Promise(resolve => {
    client.getSecret(secretName).then(latestSecret => {
      console.log(`value from secret is`, latestSecret.value);
      resolve(latestSecret.value)
    })
  })
}
const dbUserName = credential(constants.pgDbUserName)
const dbPassword = credential(constants.pgDbPassword)

const hostname = constants.pgHostname;
const port = constants.pgPort;
const dbName = constants.pgDbName;
const sequelize = new Sequelize(dbName, dbUserName, dbPassword, {
  host: hostname,
  port: port,
  dialect: constants.dialectName,
  logging: false,
  pool: {
    max: constants.pgMaxPoolConnections,
    min: constants.pgMinPoolConnections,
    acquire: constants.pgMakeConnectionTimeOut,
    idle: constants.pgIdleTimeout
  }
});
sequelize.authenticate()
  .then(() => {
    console.log('Successfully connected.');
    User.sync();
    Credentials.sync();
    App.sync();
    Entity.sync();
    EntityField.sync();
    Relationship.sync();
  })
  .catch(err => console.log('Error: ' + err))

我正在使用上面的代码连接到 postgres 数据库。但是我在执行节点索引命令时收到以下错误，这里没有附加 index.js。 我希望 dbUSerName 和 dbUserpassword 值在从 Vault 中获取后传递到 sequelize 连接字符串中。但这些价值观是我无法解决的承诺。

错误：uncaughtException：“字符串”参数必须是字符串类型或 Buffer 或 ArrayBuffer 的实例。收到一个 Promise 实例

Answer 1

credential函数返回Promise，需要将其作为promise函数调用。

您可以在此处阅读有关承诺的信息 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise

我认为将代码包装在异步函数中并在调用credential之前使用await会更好

async function main() {
    const dbUserName = await credential(constants.pgDbUserName);
    const dbPassword = await credential(constants.pgDbPassword);
 
    // Your code
}

main();