[SQLObject] Re: FormEncode validators

[Randall S. <ra...@tn...>]

Ian Bicking wrote:

> 
> You should look at formencode.sqlschema -- it's important to note that 
> model validators and input validators have to be used differently, since 
> the model validators are always implicitly applied, and the form 
> validators are only explicitly applied.  I'm also of the general belief 
> that model validators and form validators shouldn't be mixed together 
> (though it is reasonable to, say, attach a form validator to the model). 
>    FormEncode is intended to be used as contextual validation: 
> http://blog.ianbicking.org/contextual-validation.html
> 

I read your blog and the article it references.  I've been thinking in 
terms of context independent validation which I see now can be problematic.

 From this article:
http://martinfowler.com/bliki/ContextualValidation.html

"But one thing that I think constantly trips people up is when they 
think object validity on a context independent way such as an isValid 
method implies."

Thanks for pointing this out.  I always like to get good advice.

Randall