Error not caught through promises

[cfoulston]

Hi, maybe I'm misunderstanding error handling with Parse Promises, but this is never caught:

Parse.Cloud.define("testError", function (request, response) {

    request.user.fetch().then(function (user) {

        throw "Test Error";

    }).then(function () {

        console.log("Got success");

        response.success(true);

    }, function (error) {

        //This never happens
        console.log("Got error: " + error);

        response.error(error);
    });
});

In my client I receive the error: Parse.ParseException: Uncaught Test Error

How do you handle errors in this way, especially for when an exception is raised at an unknown point?

[andrewimm]

Hi @cfoulston, please read more in #57.

Parse Promises, when they were first implemented, were based on the Promises/A spec (the more modern A+ spec had not been introduced yet). The differences between the two are negligible, with one exception (no pun intended): A+ promises will catch exceptions and not propagate them, A promises will propagate exceptions upwards, stopping execution. From 1.6.8 onwards, we've allowed users to explicitly enable A+ compatibility, and it will be the default in 1.7 and beyond.