嵌套承诺的问题

Question

我嵌套了 asyc await 函数调用，如下所示。我无法将第一个 promise 的返回值传递给下一个 promise。下面的代码有什么问题？

const ret = ProductRepository.getProductsBySameBrand(brand);
        ret.then(function (result) {
            shuffle(result.items).then(function (result) {
                console.log(result) //console is printing proper output
                return result; // This is not returning anything to the next chain
            });
        }).then(function (result) {
               // result is undefined
            context.setState({ products: result });
        });

Answer 1

也许我遗漏了一些东西，但你不能把 constext.setState 移到之前的承诺上吗？

const ret = ProductRepository.getProductsBySameBrand(brand);
        ret.then(function (result) {
            shuffle(result.items).then(function (result) {
                console.log(result) //console is printing proper output
                context.setState({ products: result }); // <-- move here
            });
        }); // <-- delete extra .then()