Django 将自定义表单错误添加到 form.errors

Question

我想写一个用户注册表格。我想实现一个 密码匹配 ，用户必须在其中输入两次密码。这是我当前的表格：

from django import forms
from passwords.fields import PasswordField

class AccountForm(forms.Form):
    email = forms.EmailField(max_length=255)
    username = forms.CharField(max_length=40)
    password = PasswordField(label="Password")
    password_confirm = PasswordField(label="Password")

在我看来，我想检查验证，如果某些内容无效，我想在我的模板中打印特定错误。这是我目前的观点：

def signup(request):
    if request.method == 'POST':
        form = AccountForm(request.POST)
        if form.is_valid():
            email = form.cleaned_data['email']
            username = form.cleaned_data['username']
            password = form.cleaned_data['password']
            password_confirm = form.cleaned_data['password_confirm']

            if password != password_confirm:
                print("Password don't match")

            #Account.objects.create_user(email, password, username = username)

        else:
            print(form.errors)
            form = Account()
    return render(request, 'authentication/auth.html', {'signup': form})

现在我的目标是将表单错误传递给模板。例如，我检查 password 与 password_confirm 变量的匹配。如果它们不匹配，我希望它在模板中可见。你们知道我如何将我的自定义表单错误/验证添加到我的表单并在我的模板中显示这些错误吗？

Answer 1

为此，您需要使用clean方法。

class AccountForm(forms.Form):
    email = forms.EmailField(max_length=255)
    username = forms.CharField(max_length=40)
    password = PasswordField(label="Password")
    password_confirm = PasswordField(label="Password")

    def clean(self):
        cd = self.cleaned_data
        if cd.get('password') != cd.get('password_confirm'):
            self.add_error('password_confirm', "passwords do not match !")
        return cd

现在，当从您的视图调用 form.is_valid() 时，将隐式调用表单的 clean 方法并执行此验证。

阅读此内容：clean values that depend on each other 了解更多信息。

Note that any errors raised by your Form.clean() override will not be associated with any field in particular. They go into a special “field” (called all), which you can access via the non_field_errors() method if you need to. If you want to attach errors to a specific field in the form, you need to call add_error().

此外，请注意 .add_error 是在 django 1.7 中引入的。

如果您使用的是 django 1.6 或更低版本，您会这样做：

if cd.get('password') != cd.get('password_confirm'):
    self._errors["password_confirm"] = self.error_class(["Passwords do not match"])
    del cleaned_data["password_confirm"]

Answer 2

class AccountForm(forms.Form):
    ....your stuff

    def clean_password(self):
        if self.data['password'] != self.data['password_confirm']:
            raise forms.ValidationError('Passwords are not the same')
        return self.data['password']

Django 将自定义表单错误添加到 form.errors

Django add custom form errors to form.errors

django

django-forms

django-validation