Django 无法保存子对象的父 ID

Posted 2023-02-24

【中文标题】Django 无法保存子对象的父 ID

【英文标题】：Django can't save parent id of child objects

【发布时间】：2021-11-15 21:00:33

【问题描述】：

当表格将被保存时，我想保存父 ID，但我不明白我在哪里做错了。我正在使用<input type="hidden" name="parent" id=i.sno> 保存父 ID，如果我从浏览器检查 html，我可以看到 ID 号。

models.py

class Contact(MPTTModel):
       user = models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.CASCADE,null=True,blank=True,related_name='contact_user')
       parent =TreeForeignKey('self', on_delete=models.CASCADE,
                            null=True, blank=True, related_name='contact_parent')
       sno = models.AutoField(primary_key=True,)
       #my others fields....

forms.py

class TicketForm(forms.ModelForm):
     class Meta:
         model = Contact
         fields = ['message','parent','sno','existing_customer','technical_service']  

views.py

 def SupportPageView(request):  
    if request.method == "POST":
       support_form =  TicketForm(request.POST or None)
       if support_form.is_valid():
          isinstance = support_form.save(commit=False)
          isinstance.user = request.user
          isinstance.name = request.user.first_name 
          isinstance.email = request.user.email
          isinstance.save()
          name = request.user.first_name 
          messages.add_message(request, messages.INFO, f'name Thanks for your message. We will get back to you very soon')   
          return redirect('contact:support-ticket')
    else:
      support_form = TicketForm()
          
    user = request.user
    support_object = Contact.objects.filter(user=user)
    

    context = "support_form":support_form,'support_object':support_object       
    return render(request,"contact/support.html",context) 

HTML

 %for i in support_object%
   <form method="POST">
                        %csrf_token%
                        
                        <textarea name="message" class="form-control" style="height: 150px;"></textarea><br>
                        <input type="hidden" name="parent" id=i.sno>
                         
                        <button type="submit" class="btn btn-info">Submit</button>
                    </form>
 %endfor%

我的表单正在保存为父级，但我希望它们将保存为子级。

【问题讨论】：

有什么问题？

Rvector 阅读了这个问题。我描述了一切

【参考方案1】：

我在 html 字段中做错了

我使用的是<input type="hidden" name="parent" id=i.sno>

但它应该是 <input type="hidden" name="parent" id="parent_id" value="i.sno">。我的 html 字段中缺少值