Django ForeignKey 获取结果
Django ForeignKey getting results
我尝试了其他问题,但仍然遇到一些问题。
我有 2 个模型:
class Media(models.Model):
name = models.CharField(max_length=100)
media = models.CharField(max_length=10, choices=MEDIA_TYPE)
class Review(models.Model):
message = models.CharField(max_length=10)
submitter = models.ForeignKey(User)
media = models.ForeignKey(Media, related_name='rev_media')
我想去做类似的事情
blaw = Media.objects.all()
for a in blaw:
print (all the reviews to have to do with this one media object)
rev_media
,您的 related_name,应该会为您提供所有将其作为外键的评论:
blaw = Media.objects.all()
for a in blaw:
print media.rev_media.all()
因为你有一个 related_name
,你可以使用 a.rev_media.all()
来获取关联对象的列表。
现在,您可以:
media_qs = Media.objects.all()
for media in media_qs:
reviews = media.rev_media.all() #basically, this is the queryset of all the associated reviews for this media object.
if reviews.exists():
print ", ".join([review.message for review in reviews])
我尝试了其他问题,但仍然遇到一些问题。
我有 2 个模型:
class Media(models.Model):
name = models.CharField(max_length=100)
media = models.CharField(max_length=10, choices=MEDIA_TYPE)
class Review(models.Model):
message = models.CharField(max_length=10)
submitter = models.ForeignKey(User)
media = models.ForeignKey(Media, related_name='rev_media')
我想去做类似的事情
blaw = Media.objects.all()
for a in blaw:
print (all the reviews to have to do with this one media object)
rev_media
,您的 related_name,应该会为您提供所有将其作为外键的评论:
blaw = Media.objects.all()
for a in blaw:
print media.rev_media.all()
因为你有一个 related_name
,你可以使用 a.rev_media.all()
来获取关联对象的列表。
现在,您可以:
media_qs = Media.objects.all()
for media in media_qs:
reviews = media.rev_media.all() #basically, this is the queryset of all the associated reviews for this media object.
if reviews.exists():
print ", ".join([review.message for review in reviews])