Hi Michael,
The best bet would be to write a custom widget, and override the render()
method. render() takes the name of the widget, the value to render, and a
dictionary of attr values. In your subclass, you can override this method
to inject the additional attributes based on the provided value - something
like:
class MyWidget(TextInput):
def render(self, name, value, attrs=None):
if value == SPECIAL VALUE:
attrs['class'] = 'class1 class2'
return super(MyWidget, self).render(name, value, attrs)
This is an oversimplification - there's a few extra edge cases you'll need
to account for - if attrs is none, or if 'class' already exists - but the
idea should hopefully make sense.
Yours,
Russ Magee %-)
On Wed, Nov 12, 2014 at 9:25 PM, Michael <michael.palumb...@gmail.com>
wrote:
> Hi,
>
> The ``attrs`` attribute of a widget allows to define the html attributes.
> For example, setting it to ``widget.attrs['class'] = 'class1 class2'`` will
> add ``class="class1 class2"`` on the rendered widget.
>
> However, how can I set them based on the data? I display an update form
> and I'd like to change the CSS class based on the data that is going to be
> displayed when the form is rendered.
>
> Where could I check for the data in order to change the ``attrs`` property
> of the widget before it is rendered?
>
> Thanks
>
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