CheckboxSelectMultiple cannot set CSS class of UL

[Tom van Dijk]

It would be nice to be able to override (or actually: set) the class of the <ul> tag of a CheckboxSelectMultiple.
Attributes of this tag cannot be set at the moment.

Example code that I now use to "hack" the class into the <ul>. The example code is used in the context of mezzanine/grappelli, which provides a nice CSS with ul.checkboxlist that works well for admin pages.

class CheckboxSelectMultipleRenderer(CheckboxFieldRenderer):
    def render(self):
        result = super(CheckboxSelectMultipleRenderer, self).render()
        return mark_safe(re.sub("<ul id", '<ul class="checkboxlist" id', result, count=1))


class CheckboxSelectMultipleCss(CheckboxSelectMultiple):
    renderer = CheckboxSelectMultipleRenderer

[Tim Graham]

I guess template-based widget rendering would add some flexibility here (#15667). That feature is expected in Django 1.10. Do you think that would meet your use case?

[Tim Graham]

Feel free to reopen if you feel that other ticket doesn't offer a good solution to this issue and you have an alternate proposal for what the API could look like.