Объект Django 'unicode' не имеет атрибута 'year'

Question

У меня проблема, которая сводит меня с ума. Я разработал приложение django, используя встроенный сервер, и теперь пытаюсь развернуть его на производственном сервере за Apache 2.2.

Я перенесла базу данных из SQLite в PostgreSQL.

В Django Admin, когда я загружаю представление «change_list» для объекта File на тестовом сервере, он загружается просто отлично. Как только я сделать то же самое на сервере, я получаю следующее:

AttributeError at /admin/wilder/file/ 

'unicode' object has no attribute 'year' 

Request Method: GET 
Request URL: https://<snip>.berkeley.edu/<snip>/admin/wilder/file/ 
Django Version: 1.4.1 
Exception Type: AttributeError 
Exception Value: 

'unicode' object has no attribute 'year' 

Exception Location: <snip>/virtualenv/wilder/lib/python2.7/site-packages/django/contrib/admin/templatetags/admin_list.py in date_hierarchy, line 302 
Python Executable: <snip>/virtualenv/wilder/bin/uwsgi 
Python Version: 2.7.5 
Python Path: 

['<snip>/virtualenv/wilder/lib/python2.7/:<snip>/virtualenv/wilder/lib/python2.7/site-packages/:<snip>/ecog_patient_db', 
'.', 
'', 
'<snip>/virtualenv/wilder/lib/python2.7/site-packages/readline-6.2.4.1-py2.7-linux-x86_64.egg', 
'<snip>/virtualenv/wilder/lib/python27.zip', 
'<snip>/virtualenv/wilder/lib/python2.7', 
'<snip>/virtualenv/wilder/lib/python2.7/plat-linux2', 
'<snip>/virtualenv/wilder/lib/python2.7/lib-tk', 
'<snip>/virtualenv/wilder/lib/python2.7/lib-old', 
'<snip>/virtualenv/wilder/lib/python2.7/lib-dynload', 
'/home/knight/king/local/lib/python2.7', 
'/home/knight/king/local/lib/python2.7/plat-linux2', 
'/home/knight/king/local/lib/python2.7/lib-tk', 
'<snip>/virtualenv/wilder/lib/python2.7/site-packages', 
'<snip>/virtualenv/wilder/lib/python2.7/site-packages/PIL'] 

Server time: Wed, 25 Sep 2013 14:41:30 -0700 



Error during template rendering 

In template /<snip>/ecog_patient_db/templates/admin/change_list.html, error at line 90 
'unicode' object has no attribute 'year' 
80 {% endif %} 
81 {% endblock %} 
82 {% if cl.formset.errors %} 
83 <p class="errornote"> 
84 {% blocktrans count cl.formset.errors|length as counter %}Please correct the error below.{% plural %}Please correct the errors below.{% endblocktrans %} 
85 </p> 
86 {{ cl.formset.non_form_errors }} 
87 {% endif %} 
88 <div class="module{% if cl.has_filters %} filtered{% endif %}" id="changelist"> 
89 {% block search %}{% search_form cl %}{% endblock %} 
90 {% block date_hierarchy %}{% date_hierarchy cl %}{% endblock %} 
91 
92 {% block filters %} 
93 {% if cl.has_filters %} 
94 <div id="changelist-filter"> 
95 <h2>{% trans 'Filter' %}</h2> 
96 {% for spec in cl.filter_specs %}{% admin_list_filter cl spec %}{% endfor %} 
97 </div> 
98 {% endif %} 
99 {% endblock %} 
100 


Environment: 


Request Method: GET 
Request URL: https://wilder.berkeley.edu/wilder/admin/wilder/file/ 

Django Version: 1.4.1 
Python Version: 2.7.5 
Installed Applications: 
('django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.sites', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'django.contrib.admin', 
'django.contrib.admindocs', 
'south', 
'reversion', 
'massadmin', 
'django_extensions', 
'ecog_patient_db.wilder') 
Installed Middleware: 
('johnny.middleware.LocalStoreClearMiddleware', 
'johnny.middleware.QueryCacheMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.transaction.TransactionMiddleware') 


Template error: 
In template <snip>/ecog_patient_db/templates/admin/change_list.html, error at line 90 
    'unicode' object has no attribute 'year' 
    80 :  {% endif %} 
    81 :  {% endblock %} 
    82 :  {% if cl.formset.errors %} 
    83 :   <p class="errornote"> 
    84 :   {% blocktrans count cl.formset.errors|length as counter %}Please correct the error below.{% plural %}Please correct the errors below.{% endblocktrans %} 
    85 :   </p> 
    86 :   {{ cl.formset.non_form_errors }} 
    87 :  {% endif %} 
    88 :  <div class="module{% if cl.has_filters %} filtered{% endif %}" id="changelist"> 
    89 :  {% block search %}{% search_form cl %}{% endblock %} 
    90 :  {% block date_hierarchy %} {% date_hierarchy cl %} {% endblock %} 
    91 : 
    92 :  {% block filters %} 
    93 :   {% if cl.has_filters %} 
    94 :   <div id="changelist-filter"> 
    95 :    <h2>{% trans 'Filter' %}</h2> 
    96 :    {% for spec in cl.filter_specs %}{% admin_list_filter cl spec %}{% endfor %} 
    97 :   </div> 
    98 :   {% endif %} 
    99 :  {% endblock %} 
    100 : 


Traceback: 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 
    136.      response = response.render() 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/response.py" in render 
    104.    self._set_content(self.rendered_content) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/response.py" in rendered_content 
    81.   content = template.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in render 
    140.    return self._render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in _render 
    134.   return self.nodelist.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in render 
    823.     bit = self.render_node(node, context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/debug.py" in render_node 
    74.    return node.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/loader_tags.py" in render 
    123.   return compiled_parent._render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in _render 
    134.   return self.nodelist.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in render 
    823.     bit = self.render_node(node, context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/debug.py" in render_node 
    74.    return node.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/loader_tags.py" in render 
    123.   return compiled_parent._render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in _render 
    134.   return self.nodelist.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in render 
    823.     bit = self.render_node(node, context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/debug.py" in render_node 
    74.    return node.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/loader_tags.py" in render 
    62.    result = block.nodelist.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in render 
    823.     bit = self.render_node(node, context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/debug.py" in render_node 
    74.    return node.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/loader_tags.py" in render 
    62.    result = block.nodelist.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in render 
    823.     bit = self.render_node(node, context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/debug.py" in render_node 
    74.    return node.render(context) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/template/base.py" in render 
    1178.      _dict = func(*resolved_args, **resolved_kwargs) 
File "<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/contrib/admin/templatetags/admin_list.py" in date_hierarchy 
    302.     if date_range['first'].year == date_range['last'].year: 

Exception Type: AttributeError at /admin/wilder/file/ 
Exception Value: 'unicode' object has no attribute 'year' 

Контекст вокруг ошибки и окружающей среды показывает, что переменная data_range возвращается в виде строки, но код ожидает его быть объектом DateTime:

<snip>/virtualenv/wilder/lib/python2.7/site-packages/django/contrib/admin/templatetags/admin_list.py in date_hierarchy 
      link = lambda d: cl.get_query_string(d, [field_generic]) 
      if not (year_lookup or month_lookup or day_lookup): 
       # select appropriate start level 
       date_range = cl.query_set.aggregate(first=models.Min(field_name), 
                last=models.Max(field_name)) 

       if date_range['first'] and date_range['last']: 
        if date_range['first'].year == date_range['last'].year: 
         ... 
         year_lookup = date_range['first'].year 
         if date_range['first'].month == date_range['last'].month: 
          month_lookup = date_range['first'].month 

      if year_lookup and month_lookup and day_lookup: 
       day = datetime.date(int(year_lookup), int(month_lookup), int(day_lookup)) 

\u25bc Local vars 
Variable Value 
month_field 
'file_modification_date__month' 

cl 
<django.contrib.admin.views.main.ChangeList object at 0x7f001c142f10> 

year_field 
'file_modification_date__year' 

field_generic 
'file_modification_date__' 

date_range 
{'first': u'2005-01-27 11:05:14', 'last': u'2013-06-12 21:17:45.085712'} 

day_field 
'file_modification_date__day' 

month_lookup 
None 

link 
<function <lambda> at 0x1250e60> 

year_lookup 
None 

day_lookup 
None 

field_name 
'file_modification_date' 

Я не могу за жизнь мне понять, почему вдруг это потерпит неудачу в производственной системе. Если я добавлю ?file_modification_date__year=2006, тогда https://<snip>.berkeley.edu/<snip>/admin/wilder/file/?file_modification_date__year=2006 загрузится правильно. Но https://<snip>.berkeley.edu/<snip>/admin/wilder/file/ - это то, что вызывает ошибку выше, но только на производственном сервере. Любые подсказки? Есть ли больше информации, которую вы, ребята, нуждаетесь?

Answer 1

Ну, это было досадно. Промывка memcache сделала трюк. Я использовал johnny_cache.