[Answer]-MultiValueDictKeyError at /boardeditor/

You should validate the forms before processing, like form.is_valid() and return appropriate
page with form and errors if its not valid.

If forms are valid use form.cleaned_data for posted data rather than request.POST.

Here is how to use forms Using forms in view

So either you can add process input field in the form.

Or for this specific instance, you can add a check in your view before processing form as

if request.POST.has_key('process'):
    # return error