Behavior of form validation with required fields

[Sebastian Sebald]

Hi everyone,

I stumbled over (IMHO) weird behavior with the validation of fields. I have
a directive that parses/validates decimal numbers that works fine. The user
input can be an decimal (with comma or dot as seperator) or blank. But if
the field is also "required" the decimal directive will be also invalid.
This is because an model field that is required will be set to undefined
not null. Here is a fiddle to illustrate it:
http://jsfiddle.net/distractedBySquirrels/Hb2qV/

Is this behavior on purpose?

[Sebastian Sebald]

Here is an small update which handles the
behavior: http://jsfiddle.net/distractedBySquirrels/Hb2qV/3/