Fix LearnBoost/mongoose#2308: add .catch()

[vkarpov15]

[miguelcobain]

Is there any way we can "monkey patch" this in our apps while this isn't merged and released?

Please merge this ASAP. :cry:

[vkarpov15]

You can do a really gnarly hack:

require('mongoose/node_modules/mpromise').prototype.catch = function (onReject) {
  return this.then(undefined, onReject);
};

But of course you'd have to maintain that code yourself. On the other hand, catch() is a trivial wrapper around then() anyway, so not a big deal :)

[cades]

please merge +1 this helps monk, too

[vkarpov15]

Still waiting on this, but with LearnBoost/mongoose#2688 this will be a non-issue. I'm strongly considering deprecating mongoose's 'mpromise by default' practice.

[oppenlander]

:+1:

[tamtakoe]

+1

[Jokero]

@aheckmann merge PR, please

[nkt]

@aheckmann Are u going to merge this?

[hustKiwi]

@vkarpov15 I recommend yaku as a replacement.

[vkarpov15]

See Automattic/mongoose#2688 - mongoose is gonna switch to a BYOP approach

[refack]

@vkarpov15 I'd be happy to merge, but I need some more test cases.

[vkarpov15]

mongoose is gonna be moving away from mpromise, and the latest release supports "bring your own promises", so this is not a priority. If you won't merge this PR as is, feel free to close it.