Django 精确查找的QuerySet值必须限制为使用切片的一个结果
我正在尝试通过外键使用一对多关系生成查询集。我正在尝试从当前登录用户获取配置文件实例,然后获取配置文件,然后,我将提取帖子和评论。关联模型包括:-Django 精确查找的QuerySet值必须限制为使用切片的一个结果,django,django-models,django-forms,django-views,Django,Django Models,Django Forms,Django Views,我正在尝试通过外键使用一对多关系生成查询集。我正在尝试从当前登录用户获取配置文件实例,然后获取配置文件,然后,我将提取帖子和评论。关联模型包括:- #models.py from django.contrib.auth.models import User #this is how profile of a sample user, say MAX looks like class Profile(models.Model): Follwers=models.IntegerField(
#models.py
from django.contrib.auth.models import User
#this is how profile of a sample user, say MAX looks like
class Profile(models.Model):
Follwers=models.IntegerField(default='0')
user=models.OneToOneField(User,on_delete=models.CASCADE,primary_key=True)
bio=models.TextField(max_length=120,blank=True)
location=models.CharField(max_length=30,blank=True)
birth_date=models.DateField(null=True,blank=True)
verified=models.BooleanField(default=False)
ProfilePic=models.ImageField(upload_to='UserAvatar',blank=True,null=True)
def __str__(self):
return self.user.username
@receiver(post_save,sender=User)
def update_user_profile(sender,instance,created,**kwargs):
if created:
Profile.objects.create(user=instance)
instance.profile.save()
class FollowingProfiles(models.Model):
Profile=models.ForeignKey(Profile,on_delete=models.CASCADE)
ProfileName=models.CharField(max_length=120,blank=True,null=True)
def __str__(self):
return self.ProfileName
class post(models.Model):
Profile=models.ForeignKey(Profile,on_delete=models.CASCADE)
Picture=models.ImageField(upload_to='PostMedia',blank=True,null=True)
DatePosted=models.DateTimeField(default=timezone.now)
Content=models.TextField(blank=True,null=True)
def __str__(self):
return self.Profile.user.username
class comment(models.Model):
post=models.ForeignKey(post,on_delete=models.CASCADE)
Profile=models.ForeignKey(Profile,on_delete=models.CASCADE)
Content=models.CharField(max_length=120,null=False,blank=False,default='it is sapora')
def __str__(self):
return self.Profile.user.username
#views.py
def feed(request):
if request.user.is_authenticated:
profile=Profile.objects.filter(user=request.user)
userfollowing=FollowingProfiles.objects.filter(Profile=profile)
for following in userfollowing:
username=following.ProfileName
useraccount=User.objects.filter(username=username)
mprofile=Profile.objects.filter(user=useraccount)
Post=post.objects.filter(Profile=mprofile)
comment=comment.objects.filter(post=Post)
final_post_queryset=final_post_queryset+Post
final_comment_queryset=final_comment_queryset+comment
return render(request,'feed/feed.html',{'final_comment_queryset':final_comment_queryset,'final_post_queryset':final_post_queryset})
else:
return redirect('signup')
它会产生以下错误:-
精确查找的QuerySet值必须使用切片限制为一个结果。此处提供的代码存在许多问题 第一:
if request.user.is_authenticated:
profile=Profile.objects.filter(user=request.user) <--- Here
此代码将在项目的任何模板中工作。有关参考,请参见相关对象的
更新
您可以使用关系在配置文件中设置以下:
class Profile(models.Models):
# rest of the code
following = models.ManyToManyField("self", blank=True)
在模板中,按如下方式显示他们的帖子:
{% if user.is_authenitcated %}
{% for post in user.profile.post_set.all %}
{{ post }}
{% for comment in post.comment_set.all %}
{{ comment }}
{% endfor %}
{% endfor %}
{% endif %}
{% if user.is_authenitcated %}
{% for profile in user.profile.following.all %}
{% for post in profile.post_set.all %}
{{ post }}
{% endfor %}
{% endfor %}
{% endif %}
profile
必须是profile对象,而不是profile查询集。此代码将仅显示用户发表的帖子,但我还想显示他或她正在关注的用户发表的帖子。在这种情况下,您需要更改following profile
。因为它没有引用它所遵循的其他配置文件(它只引用了用户的配置文件),那么您能建议一些更改吗?@Gagan如果这个答案对您有帮助。谢谢
profile=Profile.objects.filter(user=request.user)[0]
userfollowing=FollowingProfiles.objects.filter(Profile=profile)