python之名称错误 : name 'Product' is not defined

我正在使用 Django 和 MongoEngine 开发一个简单的应用程序。我在后台运行 mongod 但我无法在 Python shell 中创建任何新元素(使用 Product 模型)。我知道这一定是一个简单的错误，但我找不到。

我的文件的层次结构如下:

products/ 
- __init.py__ 
- models.py 
- views.py 
__init__.py 
manage.py 
settings.py 
urls.py 
wsgi.py 

Python 外壳

>>> Product(name="test").save 
Traceback (most recent call last): 
  File "<console>", line 1, in <module> 
NameError: name 'Product' is not defined 

模型.py

from mongoengine import * 
 
class Product(Document): 
    name = StringField(max_length=200) 

设置.py

 # Django settings for project. 
 
from mongoengine import connect 
 
connect('db1') 
 
DEBUG = True 
TEMPLATE_DEBUG = DEBUG 
 
ADMINS = ( 
    # ('Your Name', 'your_email@example.com'), 
) 
 
MANAGERS = ADMINS 
 
# MongoDB settings 
MONGODB_DATABASES = { 
    'default': {'name': 'db1'} 
}    
 
AUTHENTICATION_BACKENDS = ( 
    'mongoengine.django.auth.MongoEngineBackend', 
) 
 
DATABASES = { 
    'default': { 
        'ENGINE': 'django.db.backends.dummy' 
    } 
} 
 
ROOT_URLCONF='urls' 
 
# Absolute filesystem path to the directory that will hold user-uploaded files. 
# Example: "/var/www/example.com/media/" 
MEDIA_ROOT = '' 
 
# URL that handles the media served from MEDIA_ROOT. Make sure to use a 
# trailing slash. 
# Examples: "http://example.com/media/", "http://media.example.com/" 
MEDIA_URL = '' 
 
# Absolute path to the directory static files should be collected to. 
# Don't put anything in this directory yourself; store your static files 
# in apps' "static/" subdirectories and in STATICFILES_DIRS. 
# Example: "/var/www/example.com/static/" 
STATIC_ROOT = '' 
 
# URL prefix for static files. 
# Example: "http://example.com/static/", "http://static.example.com/" 
STATIC_URL = '/static/' 
 
# Additional locations of static files 
STATICFILES_DIRS = ( 
    # Put strings here, like "/home/html/static" or "C:/www/django/static". 
    # Always use forward slashes, even on Windows. 
    # Don't forget to use absolute paths, not relative paths. 
) 
 
# List of finder classes that know how to find static files in 
# various locations. 
STATICFILES_FINDERS = ( 
    'django.contrib.staticfiles.finders.FileSystemFinder', 
    'django.contrib.staticfiles.finders.AppDirectoriesFinder', 
#    'django.contrib.staticfiles.finders.DefaultStorageFinder', 
) 
 
# Make this unique, and don't share it with anybody. 
SECRET_KEY = '' 
 
# List of callables that know how to import templates from various sources. 
TEMPLATE_LOADERS = ( 
    'django.template.loaders.filesystem.Loader', 
    'django.template.loaders.app_directories.Loader', 
#     'django.template.loaders.eggs.Loader', 
) 
 
MIDDLEWARE_CLASSES = ( 
    'django.middleware.common.CommonMiddleware', 
    'django.contrib.sessions.middleware.SessionMiddleware', 
    'django.middleware.csrf.CsrfViewMiddleware', 
    'django.contrib.auth.middleware.AuthenticationMiddleware', 
    'django.contrib.messages.middleware.MessageMiddleware', 
    # Uncomment the next line for simple clickjacking protection: 
    # 'django.middleware.clickjacking.XFrameOptionsMiddleware', 
) 
 
# Python dotted path to the WSGI application used by Django's runserver. 
WSGI_APPLICATION = 'wsgi.application' 
 
TEMPLATE_DIRS = ( 
    # Put strings here, like "/home/html/django_templates" or "C:/www/django/templates". 
    # Always use forward slashes, even on Windows. 
    # Don't forget to use absolute paths, not relative paths. 
) 
 
INSTALLED_APPS = ( 
    'django.contrib.auth', 
    'django.contrib.contenttypes', 
    'django.contrib.sessions', 
    'django.contrib.sites', 
    'django.contrib.messages', 
    'django.contrib.staticfiles', 
    'products', 
    'django.contrib.auth', 
    'mongoengine.django.mongo_auth', 
 
    # Uncomment the next line to enable the admin: 
    # 'django.contrib.admin', 
    # Uncomment the next line to enable admin documentation: 
    # 'django.contrib.admindocs', 
) 
 
SESSION_ENGINE = 'mongoengine.django.sessions' 
AUTH_USER_MODEL = 'mongo_auth.MongoUser' 
 
# A sample logging configuration. The only tangible logging 
# performed by this configuration is to send an email to 
# the site admins on every HTTP 500 error when DEBUG=False. 
# See http://docs.djangoproject.com/en/dev/topics/logging for 
# more details on how to customize your logging configuration. 
LOGGING = { 
    'version': 1, 
    'disable_existing_loggers': False, 
    'filters': { 
        'require_debug_false': { 
            '()': 'django.utils.log.RequireDebugFalse' 
        } 
    }, 
    'handlers': { 
        'mail_admins': { 
            'level': 'ERROR', 
            'filters': ['require_debug_false'], 
            'class': 'django.utils.log.AdminEmailHandler' 
        } 
    }, 
    'loggers': { 
        'django.request': { 
            'handlers': ['mail_admins'], 
            'level': 'ERROR', 
            'propagate': True, 
        }, 
    } 
} 

请您参考如下方法:

在使用 Product 之前，您应该导入 Product:

>>> from products.models import Product 

如果您不想手动导入模型，请使用 django-extension shell_plus命令: