[英]How to chain Q promise with previous errors on finally()
I am wondering how to chain errors on Q using finally. 我想知道如何最终使用Q链接错误。
Consider following code 考虑以下代码
function p1() {
throw new Error("p1 error");
}
function p2() {
throw new Error("p2 error");
}
function p3() {
return Q.fcall(p1)
.finally(function () {
return Q.fcall(p2);
});
}
p3()
.done();
The Error with message "p1 error" is lost since it was override by Error "p2 error". 消息“ p1错误”的错误已丢失,因为已被错误“ p2错误”覆盖。 How can I throw all the errors (or combine the errors)? 如何抛出所有错误(或合并错误)?
Currently, I am working on a socket connection on nodejs. 目前,我正在nodejs上进行套接字连接。 I am using .finally() to close the socket after each connection. 我正在使用.finally()在每次连接后关闭套接字。
However, errors (eg: authentication error) before .finally() will be overriden by one in .finally() (eg: connection close error). 但是,.finally()之前的错误(例如:身份验证错误)将被.finally()中的一个错误覆盖(例如:连接关闭错误)。 So, I am wondering how to get all errors 所以,我想知道如何获取所有错误
Thanks 谢谢
You could do something like this: 您可以执行以下操作:
function p3() {
return Q.fcall(p1)
.finally(function(p) {
return Q.fcall(p2).catch(function(e) {
if (!p.isRejected()) throw e;
var agg = new Error("multiple errors occured");
agg[0] = p.inspect().reason;
agg[1] = e;
agg.length = 2;
throw agg;
});
});
}
(based on Bluebird's AggregateError
) (基于Bluebird的AggregateError
)
Of course it is tedious, but I can't imagine something better. 当然这很乏味,但是我无法想象更好的东西。
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