我有两个模型:Question
和UserEdus
。
UserEdus
可以对Question
投票。
投票后,Question
会存储已投票的相关UserEdus
列表。我不知道如何创建和添加此关联。
说Question
可以有多少UserEdus
正确的方法来考虑这个问题吗?
这是我到目前为止所拥有的。
class Question(models.Model):
title = models.CharField(max_length=500, null=False)
content = models.TextField(max_length=10000, null=False)
author = models.ForeignKey('UserEdus', null=False)
solution_found = models.BooleanField(default=False, null=False)
points = models.IntegerField(default=1, null=False)
post_date = models.DateField(default=date.today)
class UserEdus(models.Model):
user = models.OneToOneField(User, on_delete=models.SET_NULL, null=True)
bio = models.TextField(max_length=400, help_text="Enter your bio details here.")
votes = models.ForeignKey(Question, null=True)
点击upvote按钮后会调用此视图,
def upvote(request,pk):
question = get_object_or_404(Question, pk=pk)
question.points += 1
request.user.useredus.votes_set.add(question)
question.save()
这将返回错误'UserEdus' object has no attribute 'votes_set'
我做错了什么?文档遵循这种模式。
答案 0 :(得分:1)
request.user.useredus.votes = question
这是正确的方法
答案 1 :(得分:1)
我认为你要找的是related_name参数和ManyToManyField模型字段。我会改变:
votes = models.ForeignKey(Question, null=True)
要:
votes = models.ManyToManyField("Question", related_name="votes")
这样你可以像这样进行查询:
somevar = Question.objects.get(pk=1)
all_votes = somevar.votes.all()
您的代码如下:
class Question(models.Model):
title = models.CharField(max_length=500, null=False)
content = models.TextField(max_length=10000, null=False)
author = models.ForeignKey('UserEdus', null=False)
solution_found = models.BooleanField(default=False, null=False)
points = models.IntegerField(default=1, null=False)
post_date = models.DateField(default=date.today)
class UserEdus(models.Model):
user = models.OneToOneField(User, on_delete=models.SET_NULL, null=True)
bio = models.TextField(max_length=400, help_text="Enter your bio details here.")
votes = models.ManyToManyField(Question, related_name="votes")
您的upvoteview看起来像:
def upvote(request,pk):
question = get_object_or_404(Question, pk=pk)
question.points += 1
question.save()
useredus = UserEdus.objects.get(user__username=request.user.username)
useredus.votes.add(question)
useredus.save()
我希望有所帮助!