Add a shortcut to edit HTML attribute on (model) forms

[anonymous]

We can already do :

        labels = {
            'name': _('Writer'),
        }
        help_texts = {
            'name': _('Some useful help text.'),
        }
        error_messages = {
            'name': {
                'max_length': _("This writer's name is too long."),
            },
        }

Can we have something similar to add attributes to fields ? Settings up a widget or modifiying the field in the init is not only very verbose, but very very hard to figure out for newcomers.

[Tim Graham]

Adding these attributes was a contentious issue and we're not going to be adding any more, see #17924.

We can definitely improve our documentation for modifying fields in __init__, see #21319 for example.