Django 使字段可选，通过完整性检查

Question

我想在我的注册页面上设置一个可选字段，这样只有当用户提供了这些信息时才会检查该字段的内容，如果没有，只需跳过数据完整性检查：

pubpgp = PGPKey.from_blob(request.POST['pubpgp'].rstrip("\r\n"))[0]

pub pgp 领域的。但我不知道如何完成这个，欢迎任何帮助。

models.py

pubpgp = models.TextField(verbose_name='Public RSA PGP Key - (ASCII-Armored)', blank=True, default='', max_length=3000)

views.py

def signup(request):
    if request.method == 'POST':
        form = RegistrationForm(request.POST)
        if form.is_valid():
            pubpgp = PGPKey.from_blob(request.POST['pubpgp'].rstrip("\r\n"))[0]
            if pubpgp.key_algorithm == PubKeyAlgorithm.RSAEncryptOrSign:
                form.save()
                messages.add_message(request, messages.INFO, "Thanks for you Registration, you are now able to login.")
                return redirect(reverse('login'))
            else:
                messages.add_message(request, messages.INFO, "Only RSA based PGP keys are allowed.")
        else:
            return render(request, 'signup.html', {'form': form})
    else:
        form = RegistrationForm()
        args = {'form': form}
        return render(request, 'signup.html', args)

提前致谢

Answer 1

如果未提供 pubpgp 参数，或者如果提供并指示正确的算法，您希望重定向到 login 视图，那么这应该只涉及一个小调整条件语句：

def signup(request):
    if request.method == 'POST':
        form = RegistrationForm(request.POST)
        if form.is_valid():
            pubpgp = request.POST.get('pubpgp')
            # Allow redirect if pubpgp is empty or not empty but correct algorithm
            if not pubpgp or PGPKey.from_blob(pubpgp.rstrip("\r\n"))[0].key_algorithm == PubKeyAlgorithm.RSAEncryptOrSign:
                form.save()
                messages.add_message(request, messages.INFO, "Thanks for you Registration, you are now able to login.")
                return redirect(reverse('login'))
            else:
                messages.add_message(request, messages.INFO, "Only RSA based PGP keys are allowed.")
        else:
            return render(request, 'signup.html', {'form': form})
    else:
        form = RegistrationForm()
        args = {'form': form}
        return render(request, 'signup.html', args)

Django 使字段可选，通过完整性检查

Django make field optional that gets check by integrity

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