Is there a way to override form values in template?

Question

I have the following in my forms.py to define choices on a form input:

selection = forms.TypedChoiceField (label="Format", choices = (("Choice1", "Choice1"), ("Choice2", "Choice2"), ("Choice3", "Choice3"),widget = forms.RadioSelect, required= True)

And in my template, I currently have the following line of code which allows people to select one of these choices.

{{ formtoaddselection.selection }}

This is fine in general, but I have a corner case where I want to sometimes overwrite those default choices to say CornerCase1 and CornerCase2.

Is it possible to override those defaults in the template, and if so, how?

Why override the values in your template? Use dynamic choices and put the logic in your form class where it belongs: http://stackoverflow.com/q/3419997/630877 — arie, Jan 22 '13 at 17:06
Thanks @arie;.. the problem with that method (I think) is that I don't have the variable I need by the time the view/form is loaded... It's after a user clicks on a particular item that I know the choices I need to populate... — user1328021, Jan 22 '13 at 18:03

score 2 · Answer 1 · answered Jan 22 '13 at 18:30

The only way to have non trivial behavior in the template layer is to build template tags.

Something like:

@register.simple_tag
def override_form_choices(field, *args, **kwargs):
    field.choices = [(x, x) for x in args]
    return field


{% override_form_choices formtoaddselection.selection 'foo' 'bar' 'baz' %}

You may find an assignment tag is more appropriate here / readable / flexible here.

Is there a way to override form values in template?

1 Answers1