Re: formEncode - complicate validate form

Grzesiek Slusarek wrote:
> Hi all. I'm using formEncode to validate my forms, and I'm 
> stopped
> on how to do a complicated validation that depened on what forms
> element was filled. I mean I want to validate file that is 
> uploaded but only when the checkbox on the form is checked. How 
> to do this?
> In python code this looks like:
> 
> if form.radio is checked:
>     #validate file form that i uploaded
>     code...
> else:
>     #validate other forms fields
>     if form.login != '' and form.password !='':
> 	code..
>     else:
> 	code..

You want a FormValidator, because you are validating pieces together. 
An example of this is 
formencode.validators.RequireIfMissing/RequireIfPresent.  You might want 
to look at the implementation; how you use that field is:

class MySchema(Schema):
     other fields...
     chained_validators = [RequireIfPresent(required='birthday', 
present='i_am_over_18')]

Form validators validate the entire dictionary that is submitted.


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


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