如何从不同模型访问多对多现场数据?

时间:2020-01-29 14:37:47

标签: django django-models django-templates django-views

我有以下型号:

class Work_Music(MPTTModel, Work):
    name = models.CharField(max_length=10, null=True, blank=True)   
    key = models.CharField(max_length=10, null=True, blank=True)
    tonality = models.CharField(max_length=20, null=True, blank=True)

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)
    order = models.DecimalField(max_digits=100, decimal_places=2, null=True, blank=True)

class Cast(models.Model):
    name = models.CharField(max_length=100, null=True, blank=True)

在view.py中,我在模板上下文中发送以下内容:

work = Work_Music.objects.get(work=self.kwargs['pk'])

如何通过Work_Music对象访问WorkCast?

如何在模板中显示

 Cast #1, Cast #2, Cast #3, Cast #4

如何吸引所有演员?是吗?

work.workcast.cast.all()

不产生任何输出。

如何将其显示为列表,中间用逗号分隔?

1 个答案:

答案 0 :(得分:0)

我认为您是在django中引用反向模型引用_set。您可以找到更多信息here。在您的情况下,您会做类似的事情,

work_music = WorkMusic.object.get(pk=1)
work_music.workcast_set.all() # would get you all workcast related to that work music object

希望这会有所帮助!