Re: OneOf Validator list as callable

Hi Gregor,
I was struggling with the very same problem today when I noticed your email. That's exactly what I need, and it works! Hope someone can notice your patch and apply it to the trunk. Have you already tried to email Ian directly?

Cheers,
Andrea

On 11 Sep 2010, at 22:09, Gregor Horvath wrote:

> Hello,
> 
> For late evaluation I need a OneOf Validator with a list argument as
> callable. (or list / tuple)
> I therefore made on enhanced version.
> Is a patch / test desired?
> 
> Greg
> 
> 
> class OneOf(FancyValidator):
> 
>    """
>    Tests that the value is one of the members of a given list.
> 
>    If ``testValueList=True``, then if the input value is a list or
>    tuple, all the members of the sequence will be checked (i.e., the
>    input must be a subset of the allowed values).
> 
>    Use ``hideList=True`` to keep the list of valid values out of the
>    error message in exceptions.
> 
>    Examples::
> 
>>>> oneof = OneOf([1, 2, 3])
>>>> oneof.to_python(1)
>        1
>>>> oneof.to_python(4)
>        Traceback (most recent call last):
>          ...
>        Invalid: Value must be one of: 1; 2; 3 (not 4)
>>>> oneof(testValueList=True).to_python([2, 3, [1, 2, 3]])
>        [2, 3, [1, 2, 3]]
>>>> oneof.to_python([2, 3, [1, 2, 3]])
>        Traceback (most recent call last):
>          ...
>        Invalid: Value must be one of: 1; 2; 3 (not [2, 3, [1, 2, 3]])
>    """
> 
>    list = None
>    testValueList = False
>    hideList = False
> 
>    __unpackargs__ = ('list',)
> 
>    messages = {
>        'invalid': _("Invalid value"),
>        'notIn': _("Value must be one of: %(items)s (not %(value)r)"),
>        }
> 
>    def validate_python(self, value, state):
>        try:
>            self.list = self.list() 
>        except TypeError:
>            pass
> 
>        if self.testValueList and isinstance(value, (list, tuple)):
>            for v in value:
>                self.validate_python(v, state)
>        else:
>            if not value in self.list:
>                if self.hideList:
>                    raise Invalid(self.message('invalid', state),
>                                  value, state)
>                else:
>                    items = '; '.join(map(str, self.list))
>                    raise Invalid(self.message('notIn', state,
>                                               items=items,
>                                               value=value),
>                                  value, state)
> 
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