docs: def post(self, request, *args, **kwargs):
          """
          Method for handling POST requests.
          If the formset is valid this will
          loop through the formset and save each form.
          A log is generated for each save. The user
          is notified of the total number of changes
          with a message. Returns a 'render redirect' to
          the current url.
  
          TODO: These formsets suffer from the same potential concurrency
          issues that the django admin has. This is caused by some issues
          with django formsets and concurrent users editing the same
          objects.
          """
          msg = None
          action = request.POST.get('actions', None)
          selected = request.POST.getlist(CHECKBOX_NAME)
          if not action == 'None' and action is not None:
              if len(selected) > 0:
                  sel = {CHECKBOX_NAME : ','.join(selected)}
                  qs = '?' + urlencode(sel)
                  return self.render(request, redirect_url = action + qs)
  
          data = self.get_list_data(request, **kwargs)
  
          l = data.get('list')
          formset = None
          if l and l.formset:
              formset = l.formset
  
          url = self.request.build_absolute_uri()
          if formset:
              # Normally calling validate on a formset.
              # will result in a db call for each pk in
              # the formset regardless if the form has
              # changed or not.
              # To try to reduce queries only do a full
              # validate on forms that changed.
              # TODO: Find a way to not have to do
              # a pk lookup for any since we already
              # have the instance we want
              for form in formset.forms:
                  if not form.has_changed():
                      form.cleaned_data = {}
                      form._errors = {}
  
          if formset and formset.is_valid():
              changecount = 0
              with transaction.commit_on_success():
                  for form in formset.forms:
                      if form.has_changed():
                          obj = form.save()
                          changecount += 1
                          self.log_action(obj, CMSLog.SAVE, url=url,
                                          update_parent=changecount == 1)
  
              return self.render(request, redirect_url=url,
                             message="%s items updated" % changecount,
                             collect_render_data=False)
          else:
              return self.render(request, message = msg, **data)