为什么我的Django表单没有引发验证错误？ [英] Why my Django form is not raising validation error?

问题描述

以下是我的表单代码：

class ConfirmEmailForm(forms.Form):
    email = forms.EmailField()
    subscribe = forms.IntegerField()
    code = forms.CharField(max_length=80)

    def clean_subscribe(self):
        value = bool(self.cleaned_data['subscribe'])
        self.cleaned_data['subscribe'] = value
        return value

    def clean(self):
        cleaned_data = super(ConfirmEmailForm, self).clean()
        email = cleaned_data['email']
        code = cleaned_data['code']
        user = User.objects.filter(username=email).first()
        if not user:
            raise forms.ValidationError('Email not found')
        self.cleaned_data['user'] = user
        if user.emailverification.is_key_expired():
            raise forms.ValidationError('Link expired, please regenerate')
        if not user.emailverification.key == code:
            raise forms.ValidationError('Invalid Link')
        return cleaned_data

我正在使用此表格进行GET请求。现在，当我发送不带 email 字段的请求时，我期望在 cleaned_data 时出现错误，但是不会引发任何错误，而是在下一行得到 KeyError 。

I am using this form for a GET request. Now when I send the request without email field, I was expecting that the error will be raised at cleaned_data, however it doesn't raise any error and rather I get KeyError at next line.

显然，由于缺席，它会引发 KeyError 。但是我的问题是，为什么错误不会在 super（ConfirmEmailForm，self）.clean（）本身引发。

Obviously it will raise an KeyError since it is absent. But my question, why the error is not being raised at super(ConfirmEmailForm, self).clean() itself.

这里是完整的追溯：

Environment:


Request Method: GET
Request URL: http://localhost:8000/user/confirm/?code=g&subscribe=1

Django Version: 1.9.6
Python Version: 3.5.1
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'nightreads',
 'nightreads.posts',
 'nightreads.user_manager']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "/Users/avi/.virtualenvs/nightreads/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response
  149.                     response = self.process_exception_by_middleware(e, request)

File "/Users/avi/.virtualenvs/nightreads/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response
  147.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/Users/avi/.virtualenvs/nightreads/lib/python3.5/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/Users/avi/.virtualenvs/nightreads/lib/python3.5/site-packages/django/views/generic/base.py" in dispatch
  88.         return handler(request, *args, **kwargs)

File "/Users/avi/Documents/code/nightreads/nightreads/user_manager/views.py" in get
  54.         if form.is_valid():

File "/Users/avi/.virtualenvs/nightreads/lib/python3.5/site-packages/django/forms/forms.py" in is_valid
  161.         return self.is_bound and not self.errors

File "/Users/avi/.virtualenvs/nightreads/lib/python3.5/site-packages/django/forms/forms.py" in errors
  153.             self.full_clean()

File "/Users/avi/.virtualenvs/nightreads/lib/python3.5/site-packages/django/forms/forms.py" in full_clean
  363.         self._clean_form()

File "/Users/avi/.virtualenvs/nightreads/lib/python3.5/site-packages/django/forms/forms.py" in _clean_form
  390.             cleaned_data = self.clean()

File "/Users/avi/Documents/code/nightreads/nightreads/user_manager/forms.py" in clean
  30.         email = cleaned_data['email']

Exception Type: KeyError at /user/confirm/
Exception Value: 'email'

为什么正在发生？我该如何解决呢？在 clean 中访问经过验证和清除的数据的正确方法是什么？

Why it is happening? And how do I solve this? What is the proper way to access validated and cleaned data in clean?

推荐答案

如果clean方法出错，则会将其添加到错误列表中，而不会引发错误。

If the clean method gets an error it will add it to the list of errors, it doesn't raise it.

您可以找到代码行此处。

        except ValidationError as e:
            self.add_error(name, e)

您可以使用 cleaned_data.get来解决它（'email'），如果找不到该值，则将返回 None -您可以进行检查。

You could resolve it by using cleaned_data.get('email') which will return None if the value isn't found - which you can then check against.

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