How do I modify the bound value for a field in a bound form in django?

Question

I override the __init__ method of my Form. I can set the initial value by doing the following:

self.fields['fieldname'].initial = ....

But given that it is bound, calling the above has no effect. I tried doing this:

self.fields['fieldname'].bound_data = ....

but this does not work. Is there a way to do this ?

Answer 1

You can update the form's data dict

self.data['fieldname'] = new_value

bound_data is a method, not an attribute, so you can't set the value there.

request.GET and request.POST are immutable, unless you create a copy(). You could do the copy in your __init__ method, or before you bind the form.

data = request.POST.copy()
form = MyForm(data=data)