Simple way to put form errors to django messages

Django form errors to messages.py

def put_forms_errors_to_messages(request, form, only_first=False):
    for field_name, error_msg in form.errors.items():
        if field_name == '__all__':
            error_msg = error_msg[0]
        else:
            field = form.fields[field_name]
            error_msg = '{}: {}'.format(field.label if field.label else field_name,
                                        error_msg[0].lower())
        messages.error(request, error_msg)
        if only_first:
            break
            
class FormInvalidMessageMixin:
    def form_invalid(self, form):
        put_forms_errors_to_messages(self.request, form)
        return super().form_invalid(form)