tpc247@??? wrote:
> Dear fellow Formencode Enthusiasts:
>
> I want to chain a field B to an existing field A, such that if user
> inputs a value for field A, then field B is required, otherwise if field
> A is empty, field B is not required. I looked at RequireIfPresent, and
> I believe I know how to use it:
>
> >>> from formencode import validators
> >>> ripi_01 = validators.RequireIfPresent('phone_type_pri',
> present='primary_phone')
> >>> ripi_01.to_python({'phone_type_pri':'', 'primary_phone':'510 420
> 4577'})
>
> Invalid: You must give a value for phone_type_pri
> >>> ripi_01.to_python({'phone_type_pri':'', 'primary_phone':''})
> {'phone_type_pri': '', 'primary_phone': ''}
> >>>
>
> but I can't seem to get it to work in context of my schema. I get a
> "Missing value" error message that at first made me conclude my schema
> was expecting 'phone_type_pri' to be required, and yet when I do input a
> value for phone_type_pri, e.g., 'home phone', I get the exact same error
> message as before ! It seems no matter what I do (e.g., if I leave
> primary_phone empty, if I select a value for phone_type_pri), I will get
> the following error:
>
> phone_type_pri: Missing value
>
> I searched on Google for RequireIfPresent and "missing value" and saw at
> least one other user (negus on the Pylons list) with this problem.
> Please let me know if I am doing something wrong:
>
> class Appl_Form(formencode.Schema):
> email = validators.Email(resolve_domain=True, not_empty=True)
> confirm_email = validators.Email(not_empty=True)
> primary_phone = validators.PhoneNumber()
> phone_type_pri = validators.PlainText()
> chained_validators = [validators.FieldsMatch('email',
> 'confirm_email'), validators.RequireIfPresent('phone_type_pri',
> present='primary_phone')]
Schemas require the fields to be present unless you put if_missing=None
in the validator. In this case you need:
phone_type_pri = validators.PlainText(if_missing=None)
I also added an explanation to the RequireIfPresent docstring.
--
Ian Bicking : ianb@??? : http://blog.ianbicking.org
-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
FormEncode-discuss mailing list
FormEncode-discuss@???
https://lists.sourceforge.net/lists/listinfo/formencode-discuss
