docs: def entries_view(self, request, form_id):
          """
          Displays the form entries in a HTML table with option to
          export as CSV file.
          """
          if request.POST.get("back"):
              change_url = admin_url(Form, "change", form_id)
              return HttpResponseRedirect(change_url)
          form = get_object_or_404(Form, id=form_id)
          entries_form = EntriesForm(form, request, request.POST or None)
          delete_entries_perm = "%s.delete_formentry" % FormEntry._meta.app_label
          can_delete_entries = request.user.has_perm(delete_entries_perm)
          submitted = entries_form.is_valid()
          if submitted:
              if request.POST.get("export"):
                  response = HttpResponse(content_type="text/csv")
                  timestamp = slugify(datetime.now().ctime())
                  fname = "%s-%s.csv" % (form.slug, timestamp)
                  header = "attachment; filename=%s" % fname
                  response["Content-Disposition"] = header
                  queue = StringIO()
                  delimiter = settings.FORMS_CSV_DELIMITER
                  try:
                      csv = writer(queue, delimiter=delimiter)
                      writerow = csv.writerow
                  except TypeError:
                      queue = BytesIO()
                      delimiter = bytes(delimiter, encoding="utf-8")
                      csv = writer(queue, delimiter=delimiter)
                      writerow = lambda row: csv.writerow([c.encode("utf-8")
                          if hasattr(c, "encode") else c for c in row])
                  writerow(entries_form.columns())
                  for row in entries_form.rows(csv=True):
                      writerow(row)
                  data = queue.getvalue()
                  response.write(data)
                  return response
              elif request.POST.get("delete") and can_delete_entries:
                  selected = request.POST.getlist("selected")
                  if selected:
                      entries = FormEntry.objects.filter(id__in=selected)
                      count = entries.count()
                      if count > 0:
                          entries.delete()
                          message = ungettext("1 entry deleted",
                                              "%(count)s entries deleted", count)
                          info(request, message % {"count": count})
          template = "admin/forms/entries.html"
          context = {"title": _("View Entries"), "entries_form": entries_form,
                     "opts": self.model._meta, "original": form,
                     "can_delete_entries": can_delete_entries,
                     "submitted": submitted}
          return render(request, template, context)