how to use form cleaned data as inputs for modelforms in django code example

Example 1: passing user instance django form submission

if form.is_valid():
    post = form.save(commit=False)
    post.author = request.user
    post.published_date = timezone.now()
    post.save()

Example 2: django get form id from request

# html


# views.py
if 'message_frm' in request.POST:
    #do somethings