Python '；非类型'；对象没有属性'__获取项目'；

在尝试访问管理面板中的用户配置文件时，我开始遇到此问题

TypeError at /admin/users/userprofile/2/
'NoneType' object has no attribute '__getitem__'

这是在我将Django存储集成到我的应用程序中以使用AmazonS3存储服务之后开始的。我不知道这里有什么冲突。回溯似乎表明问题在于我在用户图像字段中使用的sorl thubmnails

这是我的设置.py

DEFAULT_FILE_STORAGE = 'storages.backends.s3boto.S3BotoStorage'
STATICFILES_STORAGE = 'storages.backends.s3boto.S3BotoStorage'

AWS_ACCESS_KEY_ID = 'my-access-key'
AWS_SECRET_ACCESS_KEY = 'my-secret-key'
AWS_STORAGE_BUCKET_NAME = 'my-bucket-name'

STATIC_URL = 'http://' + AWS_STORAGE_BUCKET_NAME + '.s3.amazonaws.com/'
ADMIN_MEDIA_PREFIX = STATIC_URL + 'admin/'

这是我的用户模型

from sorl.thumbnail import ImageField

class UserProfile(AbstractBaseUser):
    email = models.EmailField(max_length=255, unique=True)
    username = models.CharField(max_length=100, unique=True)
    name = models.CharField(max_length=255)
    location = models.CharField(max_length=255, blank=True, null=True)
    website = models.CharField(max_length=255, blank=True, null=True)
    image = ImageField(upload_to='media', blank=True, null=True)
    points = models.PositiveIntegerField(default=0)
    added_on = models.DateTimeField(auto_now_add=True)

    is_active = models.BooleanField(default=True)
    is_admin = models.BooleanField(default=False)

这是问题的回溯

Environment:


Request Method: GET
Request URL: http://www.localhost/admin/users/userprofile/2/

Django Version: 1.6.5
Python Version: 2.7.3
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.sites',
 'south',
 'rest_framework',
 'django_extensions',
 'debug_toolbar',
 'django_jinja',
 'django_statsd',
 'django_user_agents',
 'alphafilter',
 'redis_status',
 'subdomains',
 'pipeline',
 'allauth',
 'allauth.account',
 'allauth.socialaccount',
 'allauth.socialaccount.providers.facebook',
 'allauth.socialaccount.providers.twitter',
 'allauth.socialaccount.providers.google',
 'sorl.thumbnail',
 'storages',
 'brands',
 'cachier',
 'categories',
 'crawler',
 'deals',
 'features',
 'facets',
 'products',
 'stores',
 'users',
 'util')
Installed Middleware:
('buyingiq.middleware.TimerMiddleware',
 'debug_toolbar.middleware.DebugToolbarMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'subdomains.middleware.SubdomainURLRoutingMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django_user_agents.middleware.UserAgentMiddleware',
 'buyingiq.middleware.VisitorMiddleware')


Template error:
In template /home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/contrib/admin/templates/admin/includes/fieldset.html, error at line 19
   'NoneType' object has no attribute '__getitem__'
   9 :             {% for field in line %}


   10 :                 <div{% if not line.fields|length_is:'1' %} class="field-box{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}"{% elif field.is_checkbox %} class="checkbox-row"{% endif %}>


   11 :                     {% if not line.fields|length_is:'1' and not field.is_readonly %}{{ field.errors }}{% endif %}


   12 :                     {% if field.is_checkbox %}


   13 :                         {{ field.field }}{{ field.label_tag }}


   14 :                     {% else %}


   15 :                         {{ field.label_tag }}


   16 :                         {% if field.is_readonly %}


   17 :                             <p>{{ field.contents|linebreaksbr }}</p>


   18 :                         {% else %}


   19 :                              {{ field.field }} 


   20 :                         {% endif %}


   21 :                     {% endif %}


   22 :                     {% if field.field.help_text %}


   23 :                         <p class="help">{{ field.field.help_text|safe }}</p>


   24 :                     {% endif %}


   25 :                 </div>


   26 :             {% endfor %}


   27 :         </div>


   28 :     {% endfor %}


   29 : </fieldset>


Traceback:
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  137.                 response = response.render()
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/response.py" in render
  105.             self.content = self.rendered_content
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/response.py" in rendered_content
  82.         content = template.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  140.             return self._render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/test/utils.py" in instrumented_test_render
  85.     return self.nodelist.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  123.         return compiled_parent._render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/test/utils.py" in instrumented_test_render
  85.     return self.nodelist.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  123.         return compiled_parent._render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/test/utils.py" in instrumented_test_render
  85.     return self.nodelist.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  62.             result = block.nodelist.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  62.             result = block.nodelist.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  196.                         nodelist.append(node.render(context))
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  155.         return self.render_template(self.template, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render_template
  137.         output = template.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  140.             return self._render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/test/utils.py" in instrumented_test_render
  85.     return self.nodelist.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  196.                         nodelist.append(node.render(context))
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  196.                         nodelist.append(node.render(context))
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  305.                 return nodelist.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  305.                 return nodelist.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/template/debug.py" in render
  91.             output = force_text(output)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/utils/encoding.py" in force_text
  100.                 s = s.__unicode__()
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/forms/forms.py" in __str__
  425.         return self.as_widget()
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/forms/forms.py" in as_widget
  475.         return widget.render(name, self.value(), attrs=attrs)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/sorl/thumbnail/admin/current.py" in render
  34.                          ) % (mini.width, value.url, mini.url, output)
File "/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/sorl/thumbnail/images.py" in width
  51.         return self.size[0]

Exception Type: TypeError at /admin/users/userprofile/2/
Exception Value: 'NoneType' object has no attribute '__getitem__'

环境：
请求方法：获取
请求URL:http://www.localhost/admin/users/userprofile/2/
Django版本：1.6.5
Python版本：2.7.3
已安装的应用程序：
（“django.contrib.admin”，
“django.contrib.auth”，
“django.contrib.contenttypes”，
“django.contrib.sessions”，
“django.contrib.messages”，
“django.contrib.staticfiles”，
“django.contrib.sites”，
“南方”，
“rest_框架”，
“django_扩展”，
“调试工具栏”，
“django_jinja”，
“django_statsd”，
“django_用户_代理”，
“字母过滤器”，
“redis_状态”，
“子域”，
"管道",，
“阿拉斯”，
“allauth.账户”，
“allauth.socialaccount”，
“allauth.socialaccount.providers.facebook”，
“allauth.socialaccount.providers.twitter”，
'allauth.socialaccount.providers.google'，
“Soll.缩略图”，
"仓库",，
“品牌”，
“卡奇尔”，
“类别”，
“爬虫”，
“交易”，
"特色",，
“面”，
"产品",，
"商店",，
“用户”，
‘util’）
已安装的中间件：
（“buyingiq.middleware.TimerMiddleware”，
“调试工具条.中间件.调试工具条中间件”，
“django.contrib.sessions.middleware.SessionMiddleware”，
'子域.middleware.SubdomainURLRoutingMiddleware'，
'django.middleware.common.CommonMiddleware'，
“django.middleware.csrf.CsrfViewMiddleware”，
'django.contrib.auth.middleware.AuthenticationMiddleware'，
'django.contrib.messages.middleware.MessageMiddleware'，
'django.middleware.clickjacking.xFrameOptions中间件'，
'django_user_agents.middleware.UserAgentMiddleware'，
'buyingiq.middleware.VisitorMiddleware'）
模板错误：
在template/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site-packages/django/contrib/admin/templates/admin/includes/fieldset.html中，第19行出现错误
“NoneType”对象没有属性“\uuuu getitem\uuuu”
9:{第%行中的字段为%}
10 :                 
11:{%if not line.fields{124; length_是：'1'而不是field.is_readonly%}{{field.errors}{%endif%}
12:{%if field.is_checkbox%}
13:{field.field}{{field.label_tag}}
14:{%else%}
15:{field.label_tag}}
16:{%if field.is_readonly%}
17:{field.contents}linebreaksbr}

18:{%else%}
19:{field.field}
20:{%endif%}
21:{%endif%}
22:{%if-field.field.help_text%}
23:
{{field.field.help_text | safe}
24:{%endif%}
25 :                 
26:{%endfor%}
27 :         
28:{%endfor%}
29 : 
回溯：
get_响应中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/core/handlers/base.py”
137response=response.render（）
render中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/response.py”
105self.content=自渲染内容
呈现内容中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/response.py”
82content=template.render（上下文）
render中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/base.py”
140返回self.\u呈现（上下文）
文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/test/utils.py”在仪表化测试渲染中
85返回self.nodelist.render（上下文）
render中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/base.py”
840bit=self.render_节点（节点，上下文）
render_节点中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/debug.py”
78返回node.render（上下文）
render中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/loader_tags.py”
123返回编译的\u父对象。\u呈现（上下文）
文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/test/utils.py”在仪表化测试渲染中
85返回self.nodelist.render（上下文）
render中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/base.py”
840bit=self.render_节点（节点，上下文）
render_节点中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/debug.py”
78返回node.render（上下文）
render中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/loader_tags.py”
123返回编译的\u父对象。\u呈现（上下文）
文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/test/utils.py”在仪表化测试渲染中
85返回self.nodelist.render（上下文）
render中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/base.py”
840bit=self.render_节点（节点，上下文）
render_节点中的文件“/home/jaskaran/coding/buyingiq/buyingiq/venv/local/lib/python2.7/site packages/django/template/debug.py”
78返回node.render（上下文）
文件“/主页/jaska