'Require `pullquote_text` if `pullquote_rating` or
`pullquote_attribution` are set.'

def clean(self):

    if ((not self.pullquote_text) and (self.pullquote_rating or self.pullquote_attribution)):
        raise ValidationError('Pullquote    text    required    if    rating    or    attribution    is    defined.')
    super(FeedApp, self).clean()
