How to set HiddenInput value?

Question

Django

There is a model with posts and comments. Comments are linked to the post via foreignkey. respectively the post field.
I made a form from ModelForm, specified fields post, fio, body
.
In the view, I declare the worm like this:

post = get_object_or_404(Post, id=id)
form = AddComment()
return render(request, 'blog/detail.html', {'post': post, 'form': form})

Tried like this:

form.post = post

but doesn't work :)

Answer 1

Understood:
form = AddComment(initial={'post': post})