Implement $q.allSettled()

[deckar01]

Q.allSettled() is very useful when you need to know which promises were resolved and which were rejected.
#5497 Was closed with "Won't fix", but the promise refactor mentioned as the alternative in the comments never happened.

[lgalfaso]

At the 1.3.x branch, $q is prototype based, so this can be added thru an extension. Still believe this does not belong to the core, but something that an external module can add to $q

[caitp]

You have to be a bit careful with it because there are technically 2 different promise implementations in angular now --- they are both essentially the same, but use different strategies for scheduling the next tick. In the version that landed (unfortunately!) they don't share a parent prototype with each other, so you'd need to add these extra things to both versions of the promise. I know it's really stupid, but what can you do =(

[deckar01]

@caitp Only one is exposed as $q, and the implementation of this feature is a static method, so it would only need to be implemented in the user-facing version.

@lgalfaso I argue that it is more useful than all therefore should be part of the core. #8738 (comment)

[Aaronius]

I agree with @deckar01: allSettled is much more useful than all and I'd really like to see it in the core. all has rarely been useful for me because of its limitations.

[Aaronius]

Where I would probably differ with @deckar01 is how allSettled should be implemented within Angular. I would propose sticking with q's allSettled API instead of what was proposed in @deckar01's PR (the difference being what is returned once the promises are settled).

[goooooouwa]

@deckar01 agreed

[woodgoblin]

It will be good to implement allSettled in $q.
I thought it will be there where I started to make my validation system, and it was a disappointment to find out that it's missing.

[lgalfaso]

It should be straightforward to create an external module that adds this
funtionality to $q

[woodgoblin]

There is something alike, but there is no bower or node support.
https://gist.github.com/Aaronius/46ae4a0f8ff052cd24f0

[insidewhy]

Implemented it and uploaded it to the bower registry:

https://github.com/ohjames/angular-promise-extras

[JakobJingleheimer]

👍

[niqdev]

Just for fun, here my implementation https://github.com/niqdev/angular-q-extras