Django Formset management-form validation error

Question

I have a form and a formset on my template. The problem is that the formset is throwing validation error claiming that the management form is \"missing or has been tampered

Answer 1

To avoid this error just wrap your formset POST bounding in a try/except block like so.

from django.core.exceptions import ValidationError # add this to your imports

if request.method == 'POST':
   try:
      delblogformset = delblog(request.POST)
   except ValidationError:
      delblogformset = None
   if delblogformset and delblogformset.is_valid():
      delblogformset.save()
          return HttpResponseRedirect('/home')

The POST request from your blogform lacks the 'ManagementForm' hidden input that is required for your delblogformset and hence the validation error is thrown. We wrap in a try/except block because we know that if ValidationError has been raised than the POST was meant for your blogform and not delblogformset.

For more information see django docs: http://docs.djangoproject.com/en/dev/topics/forms/formsets/#understanding-the-managementform