我有以下型号:
class Cast(models.Model):
name = models.CharField(max_length=100, null=True, blank=True)
def __str__(self):
return self.name
class WorkCast(models.Model):
work = models.ForeignKey(Work_Music, verbose_name=_('work'), related_name='workcast', null=True, blank=True, on_delete=models.PROTECT)
cast = models.ManyToManyField(Cast, verbose_name=_('cast'), related_name='workcast', blank=True)
我正在尝试生成列表:
Cast member #1, cast member #2, cast member #3 from the WorkCast model:
我尝试将其添加到模型中,但未生成任何内容。怎么了?
def __str__(self):
return "%s" % (
self.cast,
", ".join(cast.name for self.cast in self.cast.set()),
)
答案 0 :(得分:0)
首先,您需要一个想要的所有Cast实例的查询集。
cast_qs = WorkCast.objects.get(id=<id>).cast.all()
然后,您可以根据需要将QS转换为列表。
cast_qs = list(cast_qs)
如果只希望列表中的某些值,则可以在查询集上调用values_list。
names = cast_qs.values_list('names', flat=True)