Question

考虑这个简单的用户个人资料：

from django.contrib.auth.models import User

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    onboarding_step = models.SmallIntegerField(default='1')

每次提交与不同模型的单独表单时，在UserProfile中递增onboarding_step的最简单方法是什么？例如：

这是我提交的ModelForm（来自一个单独的模型，Site）：

class OnBoardingProgressForm(forms.ModelForm):
      class Meta:
            model = Site
            fields = ( 'abc', 'xyz', )

以下是表单的view.py：

if request.method == "POST":
    form = OnBoardingProgressForm( request.POST )
        if form.is_valid():
            ....
            THIS CODE DOES NOT WORK BUT IS MY BEST GUESS:
            last = request.user.profile
            last.onboarding_step = 2
            ....
            obj = form.save(commit=False)
            obj.user = current_user
            obj.save()

            return render(request, "nextpage.html", {'form': form })

如何通过user.onboarding_step增加1？

Answer 1

if request.method == "POST":
    form = OnBoardingProgress( request.POST )
        if form.is_valid():
            ....
            // Can I increment the code here? //
            ....
            obj = form.save(commit=False)                
            obj.user = current_user
            obj.save()

            user_obj = UserProfile.objects.get(user=request.user)
            user_obj.onboarding_step = user_obj.onboarding_step + 1
            user_obj.save()

            return render(request, "nextpage.html", {'form': form })

或者你也可以制作自动增量字段。

Answer 2

获取当前用户的UserProfile对象，然后增加onboarding_step属性的值。

试试这个：

if request.method == "POST":
    form = OnBoardingProgress(request.POST)
    current_user = request.user
    if form.is_valid():  
        user_profile = UserProfile.objects.filter(user=current_user)[0] # get the user profile object for the current user
        user_profile.onboarding_step += 1 # increment the value  
        user_profile.save() # save the object                 
        obj = form.save(commit=False)
        obj.user = current_user
        obj.save()

        return render(request, "nextpage.html", {'form': form })

如何更新View.py中的变量

2 个答案: