django更新模型 [英] django update modelform

问题描述

我有一个模型如下

class UserPrivacy(models.Model):
    user = models.ForeignKey(User)
    profile = models.SmallIntegerField(default=1, choices=PRIVACY_TYPE)
    contact = models.SmallIntegerField(default=1, choices=PRIVACY_TYPE)
    friends = models.SmallIntegerField(default=1, choices=PRIVACY_TYPE)
    location = models.SmallIntegerField(default=1, choices=PRIVACY_TYPE)

我的模型形式如下

class PrivacyForm(ModelForm):
    class Meta:
        model = UserPrivacy
        exclude = ('user','location')

我的功能看起来像这样显示和更新表单。

My function looks like this to display and update the form.

def show_privacy(request):
    if not request.user.is_authenticated():
        return HttpResponseRedirect('/')

    if request.method == 'POST':
        form = PrivacyForm(request.POST, instance=User.objects.get(pk=request.session['id']))
        if form.is_valid():
            form.save()

    else:
        form = PrivacyForm()

    return render_to_response('settings_privacy.html', {'form': form}, context_instance=RequestContext(request))

我的数据库中的user_id为1 ..但是当我发布表单时，它永远不会被更新。我知道form.save（）被调用，因为在那里打印出来，它显示在dev服务器中。

My user_id in the db is 1.. but when I post a form it never gets updated. I know form.save() gets called due to putting a print there and it gets shown in the dev server.

推荐答案

Andy Hume在您的问题的评论中是正确的。

Andy Hume was correct in the comments to your question.

您有一个基于UserPrivacy模型的ModelForm，但您传递一个User的实例。

You have a ModelForm based on the UserPrivacy model, yet you are passing it an instance of User.

你想做的是这样的：

form = PrivacyForm(request.POST, instance=UserPrivacy.objects.get(user=request.user)

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