如何将 max_length 添加到 allauth 用户名

我使用 Django allauth 作为我的 Django 站点的用户帐户框架。文档显示有一个ACCOUNT_USERNAME_MIN_LENGTH http://django-allauth.readthedocs.io/en/latest/configuration.html然而没有ACCOUNT_USERNAME_MAX_LENGTH因为某些原因。

有什么方法可以设置用户名的最大长度吗？

这是我的自定义 allauth 注册表单 - 也许我可以在这里做点什么？：

class AllauthSignupForm(forms.Form):

    captcha = ReCaptchaField(
        public_key=config("RECAPTCHA_PUBLIC_KEY"),
        private_key=config("RECAPTCHA_PRIVATE_KEY"),
    )

    class Meta:
        model = User

    def signup(self, request, user):
        """ Required, or else it throws deprecation warnings """
        pass

Edit:尝试子类化 SignupView

草稿1/forms.py

class AllauthSignupForm(SignupForm):
    def __init__(self, *args, **kwargs):
        super(AllauthSignupForm, self).__init__(*args, **kwargs)
        self.fields['username']['validators'] += MaxLengthValidator(150,
                                                                    "Username should be less than 150 character long")

    captcha = ReCaptchaField(
        public_key=config("RECAPTCHA_PUBLIC_KEY"),
        private_key=config("RECAPTCHA_PRIVATE_KEY"),
    )

    class Meta:
        model = User

    def signup(self, request, user):
        """ Required, or else it throws deprecation warnings """
        pass

草稿1/views.py

from allauth.account.views import SignupView

class MySignupView(SignupView):
    form_class = AllauthSignupForm

allauth/account/urls.py

url(r"^signup/$", MySignupView.as_view(), name="account_signup"),

草稿1/设置.py

ACCOUNT_SIGNUP_FORM_CLASS = 'draft1.forms.AllauthSignupForm'

上面的代码返回此错误：

Traceback (most recent call last):
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/utils/autoreload.py", line 228, in wrapper
    fn(*args, **kwargs)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 125, in inner_run
    self.check(display_num_errors=True)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/management/base.py", line 359, in check
    include_deployment_checks=include_deployment_checks,
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/management/base.py", line 346, in _run_checks
    return checks.run_checks(**kwargs)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/checks/urls.py", line 16, in check_url_config
    return check_resolver(resolver)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/checks/urls.py", line 26, in check_resolver
    return check_method()
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/urls/resolvers.py", line 254, in check
    for pattern in self.url_patterns:
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/urls/resolvers.py", line 405, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/urls/resolvers.py", line 398, in urlconf_module
    return import_module(self.urlconf_name)
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 665, in exec_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "/Users/zorgan/Desktop/vorsso/venvor/draft1/urls.py", line 6, in <module>
    from . import views
  File "/Users/zorgan/Desktop/vorsso/venvor/draft1/views.py", line 11, in <module>
    from .forms import UserSettingsForm
  File "/Users/zorgan/Desktop/vorsso/venvor/draft1/forms.py", line 8, in <module>
    from allauth.account.forms import SignupForm
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/allauth/account/forms.py", line 228, in <module>
    class BaseSignupForm(_base_signup_form_class()):
  File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/allauth/account/forms.py", line 216, in _base_signup_form_class
    fc_classname))
django.core.exceptions.ImproperlyConfigured: Module "draft1.forms" does not define a "AllauthSignupForm" class

这可以通过扩展来快速完成DefaultAccountAdapter类并覆盖clean_username方法。您还需要参考clean_username在我们的自定义验证之后再次完成其他内置验证。

可以按如下方式完成。

from allauth.account.adapter import DefaultAccountAdapter
from django.forms import ValidationError

class UsernameMaxAdapter(DefaultAccountAdapter):

    def clean_username(self, username):
        if len(username) > 'Your Max Size':
            raise ValidationError('Please enter a username value less than the current one')
        return DefaultAccountAdapter.clean_username(self,username) # For other default validations.

最后，指向settings.py中的子类

ACCOUNT_ADAPTER = 'YourProject.adapter.UsernameMaxAdapter'

参考：https://github.com/pennersr/django-allauth/blob/8fbbf8c1d32832d72de5ed1c7fd77600af57ea6f/allauth/account/adapter.py#L244 https://github.com/pennersr/django-allauth/blob/8fbbf8c1d32832d72de5ed1c7fd77600af57ea6f/allauth/account/adapter.py#L244