Re: Renaming fields using a Schema

Ed Singleton wrote:
> I'm using a FormEncode Schema to validate a dictionary, and I was
> wondering if it would be easy to get the validator to rename fields on
> the way through?
> 
> Something like:
> 
> data = {'email': '[email protected]'}
> 
> class MyValidator(validators.Schema):
>     email = validators.Email(not_empty=True, new_field_name='user_email')
> 
> my_validator = MyValidator()
> 
> valid_data = my_validator.to_python(data)
> 
> print valid_data
> 
> ## {'user_email': '[email protected]'}

You'll need to use a form validator, like:

class RenameField(FormValidator):
     def __init__(self, start_name, end_name, **kw):
         FormValidator.__init__(
             self, start_name=start_name, end_name=end_name, **kw)
     def _to_python(self, value, state):
         value[end_name] = value[start_name]
     def _from_python(self, value, state):
         value[start_name] = value[end_name]


class MySchema(Schema):
     pre_validators = [RenameField('email', 'user_email')]



-- 
Ian Bicking | [email protected] | http://blog.ianbicking.org

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