Python 如何为django注册创建自定义django后端？

我已经读过了

我有机会制作自己的后端。我这样做是因为我想创建一个后端，不允许使用相同的电子邮件进行注册，我想更改电子邮件错误消息。我还想在我自己的领域添加

以下是我的想法：

from django import forms
from registration.forms import RegistrationForm
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User
from registration.forms import attrs_dict

class customRegistrationForm(RegistrationForm):
    email2 = forms.EmailField(widget=forms.TextInput(attrs=dict(attrs_dict,
        maxlength=75)),
        label=_("Confirm email"))

    def clean_email(self):
        """
        Validate that the email is alphanumeric and is not already
        in use.
        """
        try:
            email = User.objects.get(email__iexact=self.cleaned_data['email'])
        except User.DoesNotExist:
            return self.cleaned_data['email']
        raise forms.ValidationError(_("That email already exists - if you have forgotten your password, go to the login screen and then select \"forgot password\""))

    def clean(self):
        """
        Verifiy that the values entered into the two email fields
        match. Note that an error here will end up in
        ``non_field_errors()`` because it doesn't apply to a single
        field.

        """
        if 'email' in self.cleaned_data and 'email2' in self.cleaned_data:
            if self.cleaned_data['email'] != self.cleaned_data['email2']:
                raise forms.ValidationError(_("The two email fields didn't match."))
        return super(RegistrationForm,clean)

上面的内容在我的init.py文件中（无论是什么文件）

然后，我的URL.py代码中有：

url(r'^accounts/register/$',
    register,
        { 'backend': 'myapp.forms.customRegistrationForm' },
    name='registration_register'),
... #other urls here!

现在，当我转到/accounts/register页面时，出现以下错误：

属性错误位于/帐户/注册表/

“customRegistrationForm”对象没有“允许注册”属性

这很奇怪。它似乎在告诉我，我需要一个“registration\u allowed”方法添加到我的子类中。但是，子类是RegistrationForm的一个子类，它运行良好，并且没有定义这些内容。。。我知道我可以加入这些成员，但这似乎超出了扩展的目的，对吗

更新

这是代码，现在它的工作

我将不同的类划分为不同文件夹中的不同的init.py文件-一个称为“forms”，一个称为“backends”，它们都位于我的主项目下的文件夹“djangRegistration”中

/表单/init.py

from django import forms
from registration.forms import RegistrationForm
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User
from registration.forms import attrs_dict

class customRegistrationForm(RegistrationForm):
    def __init__(self, *args, **kw):
        super(RegistrationForm, self).__init__(*args, **kw)
        self.fields.keyOrder = [
            'username',
            'email',
            'email2',
            'password1',
            'password2'
        ]

    email2 = forms.EmailField(widget=forms.TextInput(attrs=dict(attrs_dict,
        maxlength=75)),
        label=_("Confirm email"))

    def clean_email(self):
        """
        Validate that the email is alphanumeric and is not already
        in use.
        """
        try:
            email = User.objects.get(email__iexact=self.cleaned_data['email'])
        except User.DoesNotExist:
            return self.cleaned_data['email']
        raise forms.ValidationError(_("That email already exists - if you have forgotten your password, go to the login screen and then select \"forgot password\""))

    def clean(self):
        """
        Verifiy that the values entered into the two email fields
        match. Note that an error here will end up in
        ``non_field_errors()`` because it doesn't apply to a single
        field.

        """
        if 'email' in self.cleaned_data and 'email2' in self.cleaned_data:
            if self.cleaned_data['email'] != self.cleaned_data['email2']:
                raise forms.ValidationError(_("The two email fields didn't match."))
        return super(RegistrationForm,clean)

from registration.backends.default import DefaultBackend
from dumpstownapp.djangoRegistration.forms import customRegistrationForm

class customDefaultBackend(DefaultBackend):
    def get_form_class(self, request):
        """
        Return the default form class used for user registration.

        """
        return customRegistrationForm

/后端/init.py

from django import forms
from registration.forms import RegistrationForm
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User
from registration.forms import attrs_dict

class customRegistrationForm(RegistrationForm):
    def __init__(self, *args, **kw):
        super(RegistrationForm, self).__init__(*args, **kw)
        self.fields.keyOrder = [
            'username',
            'email',
            'email2',
            'password1',
            'password2'
        ]

    email2 = forms.EmailField(widget=forms.TextInput(attrs=dict(attrs_dict,
        maxlength=75)),
        label=_("Confirm email"))

    def clean_email(self):
        """
        Validate that the email is alphanumeric and is not already
        in use.
        """
        try:
            email = User.objects.get(email__iexact=self.cleaned_data['email'])
        except User.DoesNotExist:
            return self.cleaned_data['email']
        raise forms.ValidationError(_("That email already exists - if you have forgotten your password, go to the login screen and then select \"forgot password\""))

    def clean(self):
        """
        Verifiy that the values entered into the two email fields
        match. Note that an error here will end up in
        ``non_field_errors()`` because it doesn't apply to a single
        field.

        """
        if 'email' in self.cleaned_data and 'email2' in self.cleaned_data:
            if self.cleaned_data['email'] != self.cleaned_data['email2']:
                raise forms.ValidationError(_("The two email fields didn't match."))
        return super(RegistrationForm,clean)

from registration.backends.default import DefaultBackend
from dumpstownapp.djangoRegistration.forms import customRegistrationForm

class customDefaultBackend(DefaultBackend):
    def get_form_class(self, request):
        """
        Return the default form class used for user registration.

        """
        return customRegistrationForm

最后，my urls.py只引用了新的后端：

url(r'^accounts/register/$',
    register,
        { 'backend': 'myapp.djangoRegistration.backends.customDefaultBackend' },
    name='registration_register'),
#more urls here! yay!

最后，我必须添加一些代码来“排序”字段的显示方式，这就是customRegistrationForm中的init方法所做的

---

谢谢

您试图使用表单作为后端，但这根本不是后端。正如您链接到的文档所解释的，后端是实现某些方法的类，包括

registration\u allowed

。表单没有实现任何这些，这并不奇怪，因为它是用于用户输入和验证的，而不是后端操作

---

然而，该页面确实给出了一个关于实现此功能的正确方法的提示。后端可以定义的方法之一是

get\u form\u class（）

，它返回要使用的表单类。因此，您需要的似乎是一个自定义后端，它继承自

registration.backends.default.DefaultBackend

，只覆盖

get\u form\u类

方法，该方法只返回

customRegistrationForm

哈哈哈！谢谢，太棒了。让我试试看！（当我读到你的答案时，我只是发出了一个大大的“Ohhhhhhhh”）