forms.py 文件源码

def handle(self, request):
        language = Language.objects.get(ascii_name=self.data['language'])
        meanings = Meaning.objects.exclude(
            id__in=set(Lexeme.objects.filter(
                language=language).values_list(
                    'meaning_id', flat=True))).all()
        if meanings:
            with transaction.atomic():
                for m in meanings:
                    Lexeme.objects.create(language=language, meaning=m)
            messages.info(
                request,
                "Added lexemes for meanings: " +
                ", ".join([m.gloss for m in meanings]))
        else:
            messages.info(
                request,
                'There is at least one lexeme '
                'for every meaning in the database.')