On Aug 13, 2006, at 4:17 AM, Ian Wilson wrote:
>
> Hello,
> How can I emulate the error handler without using a validator? For
> example if a product's name is a duplicate I need to go back to the
> form and have name's error text read "A product with this name already
> exists."
>
> So say I have something like this:
>
> @expose(...)
> def edit(self, **kwargs):
> return dict(form=form, ...)
>
> @expose(...)
> @validate(form=form)
> @error_handler(edit)
> def save(self, **kwargs):
> id = kwargs.get('id', None)
> name = kwargs.get('name')
> #Check if duplicate exists
> try:
> duplicateProduct = Product.byName(name):
> except:
> pass
> else:
> if duplicateProduct.id != id: #Product with same name and
> different id exists
> #Error here for name field, what goes here to get back to edit?
> ...
>
> ...
>
> redirect("/edit", id=id)
You could check for the duplicate in a custom validator for the name
field so you can raise an Invalid exception with the error message. I
think it would be the easiest way to accomplish what your'e trying to
do.
Alternatively, you could raise an exception insde the controller and
catch it with an exception_handler that branches to an exception
handler method.
HTH,
Alberto
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