以Django格式获取请求数据

Question

是否可以在表单类中获取request.user数据？我想清理一个电子邮件地址,以确保它是唯一的,但如果它是当前用户的电子邮件地址,那么它应该通过.

这是我目前拥有的创建新用户非常有用的东西,但如果我想编辑用户,我会遇到他们的电子邮件未经验证的问题,因为它已经出现了.如果我可以使用request.user.email检查它是他们的电子邮件,那么我将能够解决我的问题,但我不知道该怎么做.

class editUserForm(forms.Form):
    email_address = forms.EmailField(widget=forms.TextInput(attrs={'class':'required'}))

    def clean_email_address(self):
        this_email = self.cleaned_data['email_address']
        test = UserProfiles.objects.filter(email = this_email)
        if len(test)>0:
            raise ValidationError("A user with that email already exists.")
        else:
            return this_email

Answer 1

正如ars和Diarmuid指出的那样,您可以将其传递request.user到您的表单中,并将其用于验证电子邮件.然而,Diarmuid的代码是错误的.代码实际上应该是:

from django import forms

class UserForm(forms.Form):
    email_address = forms.EmailField(widget = forms.TextInput(attrs = {'class':'required'}))

    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop('user', None)
        super(UserForm, self).__init__(*args, **kwargs)

    def clean_email_address(self):
        email = self.cleaned_data.get('email_address')
        if self.user and self.user.email == email:
            return email
        if UserProfile.objects.filter(email=email).count():
            raise forms.ValidationError(u'That email address already exists.')
        return email

然后,在您的视图中,您可以像这样使用它:

def someview(request):
    if request.method == 'POST':
        form = UserForm(request.POST, user=request.user)
        if form.is_valid():
            # Do something with the data
            pass
    else:
        form = UserForm(user=request.user)
    # Rest of your view follows

请注意,您应该将request.POST作为关键字参数传递,因为构造函数需要'user'作为第一个位置参数.

这样做,您需要user作为关键字参数传递.您既可以request.POST作为位置参数传递,也可以传递关键字参数(via data=request.POST).

Answer 2

以下是使用通用视图时在表单中获取用户的方法:

在视图中,request.user使用get_form_kwargs以下命令传递给表单:

class SampleView(View):
    def get_form_kwargs(self):
        kwargs = super(SampleView, self).get_form_kwargs()
        kwargs['user'] = self.request.user
        return kwargs

在表格中,您将收到user以下__init__功能:

class SampleForm(Form):
    def __init__(self, user, *args, **kwargs):
        super(SampleForm, self).__init__(*args, **kwargs)
        self.user = user

Answer 3

正如您所知，使用 Django 1.4 和基于泛型类的 CreateView 和 UpdateView，每个模型表单上都会填充一个 self.instance，这使您可以将 POSTed 电子邮件与当前用户电子邮件进行比较。

这是一个使用 mixin 的代码示例

class EmailUniqueMixin(object):
    """
    Ensure each User's email is unique
    on the form level
    """
    def clean_email(self):
        email = self.cleaned_data['email']
        existing_email = User.objects.filter(email=email).exclude(pk=self.instance.id)
        if existing_email:
            raise forms.ValidationError('That email address already exists')
        else:
            return email