字段错误django

Question

我需要帮助，我不知道问题来自哪里，请参阅下面的代码

@api_view(['GET'])
@permission_classes([IsAuthenticated])
def post_feed_view(request, *args, **kwargs):
user = request.user
profiles = user.follow_user.all()
followed_users_id = []
if profiles.exists():
followed_users_id = [x.user.id for x in profiles]
followed_users_id.append(user.id)
queryset = Post.objects.filter(user__id__in=followed_users_id).order_by("-date_posted")
serializer = PostSerializer(queryset, many=True)
return Response(serializer.data, status=200)

我一直收到这样的错误：无法将关键字"user"解析到字段中。选项包括：author、author_id、，尽管，在我的模型中，我没有；用户"；我所拥有的是"；作者"；。但我不知道该把作者放在哪里。我想我的问题是我没有完全理解"；request.user"；。

请帮忙！。

================

这是Profile和Follow模型：

class Profile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
bio = models.CharField(max_length=245, null=True)
image = models.ImageField(default='default.png', upload_to='profile_pics')
interests = models.ManyToManyField(Category, related_name='interests_user')
stripe_customer_id = models.CharField(max_length=50, blank=True, null=True)
one_click_purchasing = models.BooleanField(default=False)
is_vendor = models.BooleanField(default=False)
# vendor
bvn = models.CharField(max_length=10, null=True, blank=True)
description = models.TextField(null=True, blank=True)
address = models.CharField(max_length=200, null=True, blank=True)
company = models.CharField(max_length=100, null=True, blank=True)
# follow_user = models.ManyToManyField('users.Follow') 

def __str__(self):
return f'{self.user.username} Profile'
@property
def followers(self):
return Follow.objects.filter(follow_user=self.user).count()
@property
def following(self):
return Follow.objects.filter(user=self.user).count()
def save(self, force_insert=False, force_update=False, using=None,
update_fields=None):
super().save()
img = Image.open(self.image.path)
if img.height > 300 or img.width > 300:
output_size = (300, 300)
img.thumbnail(output_size)
img.save(self.image.path)

class Follow(models.Model):
user = models.ForeignKey(User, related_name='user', on_delete=models.CASCADE)
follow_user = models.ForeignKey(User, related_name='follow_user', on_delete=models.CASCADE)
date = models.DateTimeField(auto_now_add=True)
old_instance = models.ForeignKey('Follow', blank=True, null=True, on_delete=models.CASCADE, editable=False)
def save(self, *args, **kwargs):
if self.pk is not None:
self.old_instance = Follow.objects.get(pk=self.pk)
super().save(*args,**kwargs)
def __str__(self):
return f"For: {self.user} // id: {self.id}"

class FollowerRelation(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
profile = models.ForeignKey("Profile", on_delete=models.CASCADE)
timestamp = models.DateTimeField(auto_now_add=True)

Answer 1

您的Post模型显然没有user字段，而是有一个author字段，因此您可以使用进行筛选

queryset = Post.objects.filter(
author_id__in=followed_users_id
).order_by('-date_posted')

但话虽如此，你不应该那样过滤。给定您的模型，您可以在一个查询中完成此操作，从而避免N+1问题。您可以简单地使用进行过滤

@api_view(['GET'])
@permission_classes([IsAuthenticated])
def post_feed_view(request, *args, **kwargs):
queryset = Post.objects.filter(
author__follow_user__user=request.user
).order_by('-date_posted')
serializer = PostSerializer(queryset, many=True)
return Response(serializer.data, status=200)