ng-hide evaluates empty strings as truthy

[fmalk]

Version 1.2.0 introduced a bug in my UI where ng-hide treats a promise evaluated as an empty string as truthy. Up to version 1.0.8, ng-hide would evaluate an empty string as falsy, following Javascript logic:

"" == true
false

"" == false
true

This is a standard case IMO: a controller calls a service for logged user, server returns 204 code (no content), $http receives an empty string as data, calls promise resolve() with an empty string. The directive <div ng-hide="variable"> should treat variable with empty string as falsy.

Related issues: #3969, #4005

[tbosch]

Hi,
Angular 1.2.0 deprecated and deactivated promise unwrapping by default. If you still need it you can turn it on again using $parseProvider.unwrapPromises(). However, in Angular 1.3.0 we will no more support it.

So you need to unwrap the promise in your controller...

Closing this. Please comment if I understood you wrong.