Model form save. Get the saved object

When you save a modelform, it returns the saved instance of the model. So all you have to do is assign it to a variable:

f = MyModelForm(request.POST)
if f.is_valid():
    m = f.save()

You do not need to mess around with commit=False or any of that stuff unless you are handling more complex data.

If you know that the model is saved (so that a proper instance exists) you can also do:

model = form.instance

Ah I just found this!

    # Create a form instance with POST data.
>>> f = AuthorForm(request.POST)

# Create, but don't save the new author instance.
>>> new_author = f.save(commit=False)

# Modify the author in some way.
>>> new_author.some_field = 'some_value'

# Save the new instance.
>>> new_author.save()

# Now, save the many-to-many data for the form.
>>> f.save_m2m()