等待不等待解决承诺

Question

这是我的小twilio函数/类返回promise,我在另一个文件中导入.我得到了,err并res在这里以承诺回报它

class TwilioService {
  sendSms(to, message) {
    return this.twilio.sendMessage(sms,(err,res) => {
      return new Promise((resolve, reject) => {
        if (err) {
          console.log(err)
          return resolve(res)
        } else {
          console.log(res, 'ppppppppppppppppp')
          return reject(res)
        }
      })
    })
  }
}

现在这是我使用该功能的功能.

但是当我这样做时,我console.log(sendSms)在控制台中得到了未定义,即使我从twilio函数返回了promise.我在这做错了什么.

import Twilio from '../../services/twilio'
const twilio = new Twilio()
const handler = async(request, reply) => {
  try {
    const sendSms = await twilio.sendSms(`+91${mobile}`, `Welcome to App. User ${verificationCode} as your signup OTP.`)
    console.log(sendSms, 'oooooooooooooooo')
  } catch(err) {
    console.log(err)
  }
}

请帮忙!!!谢谢

Answer 1

你现在正在返回回调,这可能不会返回Promise- 切换顺序,返回Promise在sendMessage回调运行时解析的.还要注意的是,你应该reject,如果有一个err,并resolve与res如果没有err,而不是其他方式:

class TwilioService {
  sendSms(to, message) {
    return new Promise((resolve, reject) => {               // switch these two lines
      return this.twilio.sendMessage(sms, (err, res) => {   // switch these two lines
        if (err) {
          console.log(err)
          return reject(res) // reject on error, don't resolve
        } else {
          console.log(res, 'ppppppppppppppppp')
          return resolve(res) // resolve when there's no error
        }
      })
    })
  }
}