Question

在Django中，我有一个运行良好的应用程序，直到尝试了本指南所说的内容：https://scribles.net/deploying-existing-django-app-to-heroku/

现在，当我尝试与用户登录时，它总是返回NonType

应用程序正常打开，我可以找回密码，对其进行修改。...但不登录。

该数据库包含用户，因此尚未删除。

当我在django shell中执行以下语句时，得到以下信息：

user = authenticate(username='email@gmail.com', password='1234')
user.name

AttributeError：'NoneType'对象没有属性'name'

>>>tpye(user)
<class 'NoneType'>

这使我认为身份验证总是向我返回NonType，因为User对象确实具有name属性。

我试图通过运行以下命令来修复它：

pipenv uninstall django-heroku
pipenv clean
pipenv install (all packages again)
pipenv lock

我试图修复它的错误数据库，然后再次创建它并删除在settings.py文件中创建的标头

一个奇怪的事实是，当我尝试在不连接互联网的情况下打开应用程序的数据库时（它是本地的，因此我不需要互联网...而且之前也不需要它）。以下消息： Image

这在我的代码中应该不是问题，因为自上次工作以来我还没有编辑任何东西，它一定与git bash或在遵循本教程时添加的依赖项有关。...< / p>

我的文件：

settings.py

import os

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'key'
AUTH_USER_MODEL = 'home.Usuario'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'widget_tweaks',
    'home',
]

AUTHENTICATION_BACKENDS = ('home.backends.UserAuthentificacionBackend',)

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.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'cryptoassistant.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'cryptoassistant.wsgi.application'


# Database
# https://docs.djangoproject.com/en/2.0/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}


# Password validation
# https://docs.djangoproject.com/en/2.0/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/2.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.0/howto/static-files/

STATIC_URL = '/static/'
STATICFILES_DIRS = [os.path.join(BASE_DIR, 'static')]

EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'smtp.gmail.com'
EMAIL_HOST_USER = 'email'
EMAIL_HOST_PASSWORD = 'password'
EMAIL_PORT = 587
EMAIL_USE_TLS = True

用户模型

class Usuario(AbstractUser):
    name = models.CharField(max_length=12, help_text="The name must be between 2 and 12 characters")
    email = models.EmailField(max_length=60, unique=True, help_text="The email must be between 5 and 30 characters")
    password = models.CharField(max_length=78)
    change_password_code = models.CharField(blank=True,max_length=15)
    activated = models.BooleanField(default=False)
    activated_code = models.CharField(default="",max_length=15)
    ip = models.CharField(blank=True,max_length=15)
    last_login = models.DateField(default=now)
    wallets = models.ManyToManyField(Wallet)
    coins = models.ManyToManyField(Coin)
    avatar = models.CharField(blank=True,default="bitcoin.png",max_length=15)
    delete_code = models.CharField(default="",max_length=9,blank=True)
    two_factors_auth = models.BooleanField(default=False)
    two_factors_auth_code = models.CharField(default="",max_length=12,blank=True)
    fingerprint = models.CharField(max_length=64,blank=True)
    private_wallets = models.ManyToManyField(PrivateWallet, blank=True)
    deleted = models.BooleanField(default=False)
    API_key = models.CharField(max_length=30, blank=True)

有什么主意吗？

非常感谢！

Answer 1

authenticate()验证一组凭据。它使用默认情况下的用户名和密码，针对每个身份验证后端检查它们，如果凭据对后端有效，则返回一个User对象。看来您确定用户名和密码凭据正确无误。

但是，如果凭据对于任何后端均无效或后端引发PermissionDenied，则它将返回None。

所以，我对发生的事情有预感：

您具有用于创建用户的用户模型（Usario）。但是，在您的自定义用户模型或BaseAbstract用户模型之间未关联用于验证用户身份的用户名。这是您需要做的：

from __future__ import unicode_literals

from django.db import models
from django.core.mail import send_mail
from django.contrib.auth.models import PermissionsMixin
from django.contrib.auth.base_user import AbstractBaseUser
from django.utils.translation import ugettext_lazy as _

from .managers import UserManager


class User(AbstractBaseUser, PermissionsMixin):
    name = models.CharField(max_length=12, help_text="The name must be between 2 and 12 characters")
    email = models.EmailField(max_length=60, unique=True, help_text="The email must be between 5 and 30 characters")
    password = models.CharField(max_length=78)
    change_password_code = models.CharField(blank=True,max_length=15)
    activated = models.BooleanField(default=False)
    activated_code = models.CharField(default="",max_length=15)
    ip = models.CharField(blank=True,max_length=15)
    last_login = models.DateField(default=now)
    wallets = models.ManyToManyField(Wallet)
    coins = models.ManyToManyField(Coin)
    avatar = models.CharField(blank=True,default="bitcoin.png",max_length=15)
    delete_code = models.CharField(default="",max_length=9,blank=True)
    two_factors_auth = models.BooleanField(default=False)
    two_factors_auth_code = models.CharField(default="",max_length=12,blank=True)
    fingerprint = models.CharField(max_length=64,blank=True)
    private_wallets = models.ManyToManyField(PrivateWallet, blank=True)
    deleted = models.BooleanField(default=False)
    API_key = models.CharField(max_length=30, blank=True)

    objects = UserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    class Meta:
        verbose_name = _('user')
        verbose_name_plural = _('users')

    # Here you can define any number of methods on your new custom user model that may be useful, for example, sending your user an email:

    def email_user(self, subject, message, from_email=None, **kwargs):
        '''
        Sends an email to this User.
        '''
        send_mail(subject, message, from_email, [self.email], **kwargs)

然后，在与models.py文件相同的目录中创建一个名为managers.py的文件，并添加以下内容：

from django.contrib.auth.base_user import BaseUserManager

class UserManager(BaseUserManager):
    use_in_migrations = True

    def _create_user(self, email, password, **extra_fields):
        """
        Creates and saves a User with the given email and password.
        """
        if not email:
            raise ValueError('The given email must be set')
        email = self.normalize_email(email)
        user = self.model(email=email, **extra_fields)
        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_user(self, email, password=None, **extra_fields):
        extra_fields.setdefault('is_superuser', False)
        return self._create_user(email, password, **extra_fields)

    def create_superuser(self, email, password, **extra_fields):
        extra_fields.setdefault('is_superuser', True)

        if extra_fields.get('is_superuser') is not True:
            raise ValueError('Superuser must have is_superuser=True.')

        return self._create_user(email, password, **extra_fields)

就是这样，您的新身份验证方法（一旦创建了新用户）就可以在您的自定义用户模型上使用！：）

免责声明：添加此代码后，您可能需要运行$ python manage.py makemigrations和$ python manage.py migrate。

身份验证方法已停止工作

1 个答案: