ngOptions group by does not display groups with value 0

[rmehlinger]

When using the "group by" feature in ngOptions, if one of your groups has a value of 0, that group will not display in the dropdown. Rather its elements will appear not to be part of a group.

Plunker: http://plnkr.co/edit/ykKLmAHRj6mEO6XIeBRH?p=info

[lgalfaso]

It looks like a real bug, but the fix will involve a small breaking change

[lgalfaso]

As a size note using the string '0' should do what it is expected

[rmehlinger]

Yeah, using 'toString()' should be a viable workaround most of the time. However my guess is this is using truthy evaluation, so I would suspect this would also break on blank strings, which are probably also a valid use case?

[lgalfaso]

@rmehlinger I think that using 0 should work, but expecting that '' works would be calling it a stretch as a label for an option group with a value of '' makes little sense (unless I see a very good example where it does)