问题:如何将getNextPaymentPayload/makePayment/confirmPayment
链接成一个循环?您始终可以使用hasAnyPayments
方法检查是否剩余任何付款。
问题:您不能并行付款。要付款,您需要等待上一个付款完成。
例:
SomeService
//first payment
.getNextPaymentPayload()
.then(paymentPayload => this.makePayment(paymentPayload))
.then(paymentResponse => this.confirmPayment)
//second payment
.then(SomeService.getNextPaymentPayload())
.then(paymentPayload => this.makePayment(paymentPayload))
.then(paymentResponse => this.confirmPayment)
//so on...
最佳答案
假设hasAnyPayments
将返回一个Promise并最终解析为布尔值:
let doPayments = () => {
return hasAnyPayments().then((hasAny) => {
if (!hasAny) {
return Promise.resolve(); // all done
} else {
return SomeService.getNextPaymentPayload()
.then(paymentPayLoad => this.makePayment(paymentPayLoad))
.then(paymentResponse => this.confirmPayment(paymentResponse))
.then(doPayments); // "recurse"
}
}
}