from postman.forms import WriteForm

class MyWriteForm(WriteForm):
    file_field = forms.FileField(widget=forms.ClearableFileInput(attrs={'multiple': True}))

from postman.views import FormView

class MyFormView(FormView):
    form_class = MyWriteForm

    def post(self, request, *args, **kwargs):
        form_class = self.get_form_class()
        form = self.get_form(form_class)
        files = request.FILES.getlist('file_field')
        if form.is_valid():
            for f in files:
                # Do something with each file.
                result = form.save()  # result is a Boolena instead of the object!

            return self.form_valid(form)
        else:
            return self.form_invalid(form)