Typehead broken when using promises in Angularjs 1.2.0rc2

[overloadnn]

On search, I get a "Error: matches is undefined" exception.

[pkozlowski-opensource]

@overloadnn http://plnkr.co/, please

[vpixle]

The problem may not necessarily be related to promises but typeahead itself
Here is the Plunk copy of the demo site with Angular 1.2.0rc1
http://plnkr.co/edit/VPk5mZy6mx4GwatULIja

[pkozlowski-opensource]

@vpixle what you see is duplicate of #813 and is already fixed in master via 7589339.

@overloadnn do you have other reproduce scenario?

[vpixle]

Pawel, give me a second to test it. I have just downloaded a "NEW" version from a http://angular-ui.github.io/bootstrap/ where is a jumbotron loadbutton that points to https://github.com/angular-ui/bootstrap/tree/gh-pages page that is featuring a month old ui-bootstrap-tpls-0.5.0.min.js

IMHO the https://github.com/angular-ui/bootstrap/tree/gh-pages should be blocked or at least the 0.5.0 file 2B deleted.

[overloadnn]

http://plnkr.co/edit/SXcZXTemPWz3snIUniwb

Switch between versions of angular in index.html and you'll see.

[countableSet]

Here's the commit from angular which broke using promise with typeahead:
angular/angular.js@3a65822

The error: TypeError: Cannot read property 'length' of undefined
From this line: https://github.com/angular-ui/bootstrap/blob/master/src/typeahead/typeahead.js#L104

[pkozlowski-opensource]

@countableSet thnx for looking into this! Indeed, seems like $parse unwraps promises now without exposing it :-( I'm not sure how to fix it atm, will have to discuss with the AngularJS team.

[wilsonjackson]

For anyone else affected by this, here's the dirty hack I came up with to work around the issue until a real solution is found:

$scope.functionThatReturnsAPromise = function () {
  var promise = $http.post(...);
  promise.$$v = promise;
  return promise;
};

$parse will unwrap any promise and load its eventual resolution value into $$v, but if you set your own $$v it will leave it alone. Obviously not good for the long term, but it's getting me by for now.

[overloadnn]

@wilsonjackson I came up with the same solution. This, however, breaks the angular change that was made for watching function changes:
Try this with / without the $$v patch:

$scope.$watch('functionThatReturnsAPromise', function (newValue, oldValue) {
        debugger;
    });

[frapontillo]

I can confirm this, I have the same issue while returning a $promise from a $resource call. Going back to 1.2.0-rc.1 fixes this.

[pkozlowski-opensource]

Yeh, RC2 broken several things pretty bad... I really need to discuss this issue with the core team as for now I don't see any straightforward solution. The work-around proposed by @wilsonjackson is the best we've got for now.

[muehle]

wilsonjackson's solution is not working for me. I'm using 1.2.0-rc.2 and bootrstrap-ui 0.6.0 (bootstrap3_bis2)