This patch adds an "AsString" converter:
> class AsString(ValidatorConverter):
> Converts things to string, but treats empty things as the empty
> string. I'm quite sure it doesn't handle every degenerate case.
> def convert(self, value):
> if value: return str(value)
> if value == 0: return str(value)
> return ""
Good for things like TextField, where you may want the empty string
instead of None (then again, you may want None.)