Question

我使用UserCreationForm来创建新用户。

from django.contrib.auth.forms import UserCreationForm

class RegistrationForm(UserCreationForm):
      class Meta:
       model = User
       fields = ['username', 'first_name', 'last_name', 'email',  'is_active']

UserCreationForm会自动添加两个字段（ Password1 和 Password2 ）。如果密码太短，则会引发错误，告诉它。或者，如果它太简单或常见。它是通过django.contrib.auth.password_validation完成的。

我想知道是否可以覆盖这些错误的消息。

现在密码验证的源代码是：

def validate(self, password, user=None):
    if len(password) < self.min_length:
        raise ValidationError(
            ungettext(
                "This password is too short. It must contain at least %(min_length)d character.",
                "This password is too short. It must contain at least %(min_length)d characters.",
                self.min_length
            ),
            code='password_too_short',
            params={'min_length': self.min_length},
        )

但是当我尝试在表单定义中使用此代码来覆盖此错误消息时，标签会更改，但error_messages保持不变：

password1 = forms.CharField(label='New Label', error_messages={'password_too_short': 'My error message for too short passwords'})

我做错了什么？

Answer 1

有关类似说明，请参阅How to use custom password validators beside the django auth password validators?。

我一直在寻找相同的东西，我认为没有办法从表单级别更改密码验证器上的错误消息。您可能最终必须编写自己的自定义验证程序，然后将其包含在AUTH_PASSWORD_VALIDATORS settings.py中（这就是我所做的）。我是这样做的：

1。转到django的内置密码验证程序并复制MinimumLengthValidator代码。这是链接：https://docs.djangoproject.com/en/2.0/_modules/django/contrib/auth/password_validation/#MinimumLengthValidator

2。在您选择的应用中创建一个python文件（我选择了我的基本应用）并为其指定了您选择的名称（我的是custom_validators.py）我看起来像这样：

    from django.utils.translation import ngettext  # https://docs.python.org/2/library/gettext.html#gettext.ngettext
    from django.core.exceptions import ValidationError

    # https://docs.djangoproject.com/en/2.0/_modules/django/contrib/auth/password_validation/#MinimumLengthValidator
    class MyCustomMinimumLengthValidator(object):
        def __init__(self, min_length=8):  # put default min_length here
            self.min_length = min_length

        def validate(self, password, user=None):
            if len(password) < self.min_length:
                raise ValidationError(
                    ngettext(
                        # silly, I know, but if your min length is one, put your message here
                        "This password is too short. It must contain at least %(min_length)d character.",
                        # if it's more than one (which it probably is) put your message here
                        "This password is too short. It must contain at least %(min_length)d characters.",
                        self.min_length
                    ),
                code='password_too_short',
                params={'min_length': self.min_length},
                )

        def get_help_text(self):
            return ngettext(
                # you can also change the help text to whatever you want for use in the templates (password.help_text)
                "Your password must contain at least %(min_length)d character.",
                "Your password must contain at least %(min_length)d characters.",
                self.min_length
            ) % {'min_length': self.min_length}

3。在settings.py中，注释掉AUTH_PASSWORD_VALIDATORS中的以下行：

    # {
    #     'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    # },

并添加以下行：

{
    'NAME': 'base.custom_validators.MyCustomMinimumLengthValidator',
            # app_name.file_name.validator_name
},

现在，每当您运行validate()或form.is_valid()（也运行validate()）时，您的密码将通过新的自定义密码验证程序而不是django的默认密码验证程序。这可能需要一些调整，但你可以通过并为django的所有默认验证器执行此操作。

希望有所帮助！

Answer 2

我找到了更好的解决方案：

不必替换该类的所有代码，只需继承类MinimumLengthValidator并修改所需的定义即可。在这种情况下，请验证并获取get_help_text。

from django.contrib.auth.password_validation import MinimumLengthValidator
from django.core.exceptions import ValidationError
from django.utils.translation import ngettext

# https://docs.djangoproject.com/en/2.0/_modules/django/contrib/auth/password_validation/#MinimumLengthValidator


class MinimumLengthValidator(MinimumLengthValidator):
    # update this definition with your custom messages
    def validate(self, password, user=None):
        if len(password) < self.min_length:
            raise ValidationError(
                ngettext(
                    "This password is too short. It must contain at least %(min_length)d character.",
                    "This password is too short. It must contain at least %(min_length)d characters.",
                    self.min_length
                ),
            ),
            code='password_too_short',
            params={'min_length': self.min_length},
        )

    # update this definition with your custom messages
    def get_help_text(self):
       return ngettext(
           "Your password must contain at least %(min_length)d character.",
           "Your password must contain at least %(min_length)d characters.",
           self.min_length
       ) % {'min_length': self.min_length}

我希望这可以帮助其他人解决这个问题。

Answer 3

对于那些只想更改验证消息的人来说，我发现了一个更好的解决方案，他们只继承了@Gustavo指定的类，并用您自己指定的自定义分类替换了密码验证设置变量

AUTH_PASSWORD_VALIDATORS = [
{
    'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
    'NAME': 'apps.user.validators.MinimumLengthValidatorCustom',
    # 'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
    'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
    'NAME': 'apps.user.validators.NumericPasswordValidatorCustom',
    # 'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},

]

Answer 4

您还可以使用Django内置的i18n：

1。。创建文件<PROJECT ROOT>/locale/en/LC_MESSAGES/django.po

msgid "This password is entirely numeric."
msgstr "The password should contain both letters and numbers."

2。。在settings.py中添加

LOCALE_PATHS = (
    os.path.join(BASE_DIR, 'locale'),
)
LANGUAGE_CODE = 'en-us'

3。。编译邮件以获取django.mo文件

django-admin compilemessages

此后，出现消息“密码应同时包含字母和数字。”将会显示，而不是“此密码完全是数字。”。

通过这种方式，您可以更改所有标准消息。

覆盖password_validation消息

4 个答案: