Question

我目前面临一个非常愚蠢的问题。我想从Django 2.1中的django.contrib.auth.forms / views继承LoginView和LoginForm 将“ django-simple-captcha”中的验证码添加到登录名。

所以我开始寻找一个解决方案，并且我已经在stackoverflow上打开了一个请求，请参阅：Django Custom Login - Form is valid but no error

，但是提到的解决方案不适合这种情况，因为只能将验证码字段放入表单中。有人可以解释一下我该如何继承吗？

这是我在项目中自己的帐户应用程序的当前状态：

accounts / views.py

def login (request):
    if request.method == 'POST':
        form = LoginForm(request.POST)
        if form.is_valid():
            form.save()
            messages.add_message(request, messages.INFO, "You are now logged-In, welcome")
            return redirect(reverse('post_list'))
    else:
        form = LoginForm(request)

        args = {'form': form}
    return render(request, 'registration/login.html', args)

accounts / forms.py：

class UsernameField(forms.CharField):
    def to_python(self, value):
        return unicodedata.normalize('NFKC', super().to_python(value))

class LoginForm(forms.Form):
    """
    Base class for authenticating users. Extend this to get a form that accepts
    username/password logins.
    """
    username = UsernameField(widget=forms.TextInput(attrs={'autofocus': True}))
    password = forms.CharField(
        label=_("Password"),
        strip=False,
        widget=forms.PasswordInput,
    )


    error_messages = {
        'invalid_login': _(
            "Please enter a correct %(username)s and password. Note that both "
            "fields may be case-sensitive."
        ),
        'inactive': _("This account is inactive or blocked."),
    }

    def __init__(self, request=None, *args, **kwargs):
        """
        The 'request' parameter is set for custom auth use by subclasses.
        The form data comes in via the standard 'data' kwarg.
        """
        self.request = request
        self.user_cache = None
        super().__init__(*args, **kwargs)

        # Set the max length and label for the "username" field.
        self.username_field = User._meta.get_field(User.USERNAME_FIELD)
        self.fields['username'].max_length = self.username_field.max_length or 254
        if self.fields['username'].label is None:
            self.fields['username'].label = capfirst(self.username_field.verbose_name)

    def clean(self):
        username = self.cleaned_data.get('username')
        password = self.cleaned_data.get('password')

        if username is not None and password:
            self.user_cache = authenticate(self.request, username=username, password=password)
            if self.user_cache is None:
                raise self.get_invalid_login_error()
            else:
                self.confirm_login_allowed(self.user_cache)

        return self.cleaned_data

    def confirm_login_allowed(self, user):
        """
        Controls whether the given User may log in. This is a policy setting,
        independent of end-user authentication. This default behavior is to
        allow login by active users, and reject login by inactive users.

        If the given user cannot log in, this method should raise a
        ``forms.ValidationError``.

        If the given user may log in, this method should return None.
        """
        if not user.is_active:
            raise forms.ValidationError(
                self.error_messages['inactive'],
                code='inactive',
            )

    def get_user(self):
        return self.user_cache

    def get_invalid_login_error(self):
        return forms.ValidationError(
            self.error_messages['invalid_login'],
            code='invalid_login',
            params={'username': self.username_field.verbose_name},
        )

如何正确继承Django 2.1 LoginForm和LoginView

0 个答案: