def to_python(self, value):
        if self._linktype is None:
            raise ValidationError(_('Type for this field is not set.'))
        try:
            value = value.strip()
            if not value:
                raise ValueError
        except:
            return None
        if not self._animeobject:
            raise ValidationError(_('AnimeItem not set.'))
        if self._linktype == 0:
            for t, r, l in LINKS_URLS[1:]:
                if r:
                    m = r.match(value)
                    if m:
                        self._linktype = t
                        if l:
                            value = l + m.groups()[-1]
            if not self._linktype:
                self._linktype = 15
        if self._linktype in (1, 2, 3) and value.isdecimal():
            value = LINKS_URLS[self._linktype][2] + value
        m = LINKS_URLS[self._linktype][1]
        if m and not m.match(value):
            raise ValidationError(_('Bad link type choosen.'))
        return super(TextToAnimeLinkField, self).to_python(value)