Python 在表单\u有效后未更新的对象

我有一个

问题

和一个

答复

创建

回复

时，我想将相关的

问题

属性设置为

new\u repries=True

。此开关应在使用通用CreateView/a表单创建

Reply

对象后发生

我可以在提交表单后立即更新对象，但是刷新页面会使更新消失。我认为这是因为更新没有保存到数据库中

Models.py

class Reply(models.Model):
    parent_question = models.ForeignKey(Question, null=True) 

class Question(models.Model):
    new_replies = models.BooleanField(default=False)

class ReplyCreate(CreateView):
"""
creates a comment object
"""
model = Reply #specify which model can be created here
fields = ['content', ] # which fields can be openly editted

...

def form_valid(self, form):
    """
    add associate blog and author to form.
    """
    #this is setting the author of the form
    form.instance.author = self.request.user.useredus

    #associate comment with Question based on passed
    parent_question = get_object_or_404(Question, pk= self.kwargs['pk'])
    form.instance.parent_question = parent_question

    response = super(ReplyCreate, self).form_valid(form)

    # PROBLEM: not being saved to dB?
    parent_question.new_replies = True  # inform the question there are new replies
    parent_question.save()

    return response

def get_success_url(self):
    return reverse('edus:question_detail', kwargs={'pk': self.kwargs['pk'], })

Views.py

class Reply(models.Model):
    parent_question = models.ForeignKey(Question, null=True) 

class Question(models.Model):
    new_replies = models.BooleanField(default=False)

class ReplyCreate(CreateView):
"""
creates a comment object
"""
model = Reply #specify which model can be created here
fields = ['content', ] # which fields can be openly editted

...

def form_valid(self, form):
    """
    add associate blog and author to form.
    """
    #this is setting the author of the form
    form.instance.author = self.request.user.useredus

    #associate comment with Question based on passed
    parent_question = get_object_or_404(Question, pk= self.kwargs['pk'])
    form.instance.parent_question = parent_question

    response = super(ReplyCreate, self).form_valid(form)

    # PROBLEM: not being saved to dB?
    parent_question.new_replies = True  # inform the question there are new replies
    parent_question.save()

    return response

def get_success_url(self):
    return reverse('edus:question_detail', kwargs={'pk': self.kwargs['pk'], })

---

每个问题有两个用户？这应该保存在问题模型中。然后调用此属性，在表单验证中可以更新第二个用户配置文件，因为您知道第二个用户是谁。不，一个问题只有一个用户。