So the error_for() function will have access to any validation errors
even if they occur with a custom validator in a custom widget? I
think that's all I really need to do what I wanted to do if so.
On Jun 26, 1:48 am, Christoph Zwerschke <[EMAIL PROTECTED]> wrote:
> kerinin wrote:
> > The 'standard' form widgets display text showing when their content
> > doesn't validate properly. If I was to write my own widget from
> > scratch and wanted to have a similar behavior, how would I do so? The
> > link to error handling on the wiki assumes you're using the existing
> > widgets and doesn't (unless i missed it) cover how to build the
> > automatic behavior into widgets.
>
> There is nothing different for custom widgets. You just add a validator
> to the widget class or set it when you instantiate the widget.
>
> > On a related note - is it possible to change how the standard widgets
> > respond to validation errors? For instance, instead of displaying the
> > text next to the form element, what if I wanted to change the
> > element's background color and display an image of a stop sign next to
> > the form element? Could I use a different color and image depending
> > on what type of validation error it was?
>
> You only need to overwrite the templatew of the standard widgets to do
> that. Replace the line
>
> <span py:if="error_for(field)" class="fielderror"
> py:content="error_for(field)" />
>
> with anything you want. E.g.
>
> <img py:if="error_for(field)" src="${tg.url('static/images/error.gif')}"
> alt="${error_for(field)}" />
>
> For differentiating between different errors, you can evaluate
> error_for(field). However, these are usually text messages which may
> vary depending on the locale. But again, you can overwrite the messages
> with something different that is not translated, e.g. error numbers
> which are evaluated in the template, or already the appropriate
> background color or file name of an error image.
>
> -- Chris
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