Question

我有一个用例来解决Promise而不返回它。在内部捕获错误，但不希望调用方等待承诺解决。

doSomething()
{
    Promise.resolve()
        .then(() => {
            // do something.
        })
        .catch(reason => {
            this.logger.error(reason);
        });
}

出现此错误：

(node:2072) Warning: a promise was created in a handler at internal/timers.js:439:21 but was not returned from it, see http://. goo.gl/rRqMUw
    at Function.Promise.cast (.../node_modules/bluebird/js/release/promise.js:225:13)

Answer 1

只需从创建fire and forget承诺的Promise回调中返回某些内容即可。

我猜测处理程序是doSomething

doSomething()
{
    Promise.resolve()
    .then(() => {
        // do something.
    })
    .catch(reason => {
        this.logger.error(reason);
    });

    return null //or anything else that's sensible
}

注意：我们通常会忽略该错误消息，但有时它们包含有价值的信息。在您的错误中，有一个链接http：//。 goo.gl/rRqMUw可以准确解释此问题：d

Node.js Promise无需返回

1 个答案: