在W Explorer的資源管理器不顯示任何頁面

Question

我有兩個相同的代碼（開發和生產）的實例，我發現這個問題只發生在生產。我部署了一個處女例子，這意味着在那之前沒有W installation的安裝。

W admin管理員顯示，我沒有網頁。我確實有2頁，即使我沒有，也不應該有「歡迎來到W Page頁」（它通常是，它在我的開發實例上）。此外，它看起來像是遺失了一部分網站。

這就是我所看到的，不管我有多少網頁創建（創建他們到達網址）

編輯： 這是在日誌中的完整的堆棧跟蹤

2017-04-21 10:27:08,898 exception 22370 ERROR Internal Server Error: /admin/pages/ 
Traceback (most recent call last): 
    File "/opt/..../venv/lib/python3.5/site-packages/django/core/handlers/exception.py", line 42, in inner 
    response = get_response(request) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/core/handlers/base.py", line 187, in _get_response 
    response = self.process_exception_by_middleware(e, request) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/core/handlers/base.py", line 185, in _get_response 
    response = wrapped_callback(request, *callback_args, **callback_kwargs) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/views/decorators/cache.py", line 43, in _cache_controlled 
    response = viewfunc(request, *args, **kw) 
    File "/opt/..../venv/lib/python3.5/site-packages/wagtail/wagtailadmin/decorators.py", line 24, in decorated_view 
    return view_func(request, *args, **kwargs) 
    File "/opt/..../venv/lib/python3.5/site-packages/wagtail/wagtailadmin/views/pages.py", line 104, in index 
    'do_paginate': do_paginate, 
    File "/opt/..../venv/lib/python3.5/site-packages/django/shortcuts.py", line 30, in render 
    content = loader.render_to_string(template_name, context, request, using=using) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/loader.py", line 68, in render_to_string 
    return template.render(context, request) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/backends/django.py", line 66, in render 
    return self.template.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 208, in render 
    return self._render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 199, in _render 
    return self.nodelist.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 994, in render 
    bit = node.render_annotated(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated 
    return self.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 174, in render 
    return compiled_parent._render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 199, in _render 
    return self.nodelist.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 994, in render 
    bit = node.render_annotated(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated 
    return self.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 174, in render 
    return compiled_parent._render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 199, in _render 
    return self.nodelist.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 994, in render 
    bit = node.render_annotated(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated 
    return self.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 174, in render 
    return compiled_parent._render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 199, in _render 
    return self.nodelist.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 994, in render 
    bit = node.render_annotated(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated 
    return self.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 70, in render 
    result = block.nodelist.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 994, in render 
    bit = node.render_annotated(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated 
    return self.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 70, in render 
    result = block.nodelist.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 994, in render 
File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated 
    return self.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/loader_tags.py", line 174, in render 
    return compiled_parent._render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 199, in _render 
    return self.nodelist.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 994, in render 
    bit = node.render_annotated(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated 
    return self.render(context) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/template/defaulttags.py", line 314, in render 
    if match: 
    File "/opt/..../venv/lib/python3.5/site-packages/django/core/paginator.py", line 112, in __len__ 
    return len(self.object_list) 
    File "/opt/..../venv/lib/python3.5/site-packages/django/db/models/query.py", line 238, in __len__ 
    self._fetch_all() 
    File "/opt/..../venv/lib/python3.5/site-packages/django/db/models/query.py", line 1087, in _fetch_all 
    self._result_cache = list(self.iterator()) 
    File "/opt/..../venv/lib/python3.5/site-packages/wagtail/wagtailcore/query.py", line 380, in specific_iterator 
    pages = model.objects.filter(pk__in=pks) 
AttributeError: 'NoneType' object has no attribute 'objects' 

Answer 1

經過進一步調查後，我發現，當您從項目中刪除頁面模型定義時會發生此錯誤，但該類型的頁面仍然存在。 （W 012 應該能夠優雅地處理這種情況 - 事實上，它不是一個錯誤，我會立即提出問題...）

您可以通過運行以下行在./manage.py shell命令行：

from django.contrib.contenttypes.models import ContentType 

[(ct.id, ct.app_label, ct.model) for ct in ContentType.objects.all() if ct.model_class() is None and ct.app_label != 'wagtailadmin'] 

希望這將使得像一個結果：

[(2, u'home', u'homepage')] 

顯示缺頁類型的內容類型ID，應用標籤和型號名稱。

爲了讓管理工作再次，運行下面的行（確保從上述結果的內容類型ID替換2）：

from wagtail.wagtailcore.models import Page 

Page.objects.filter(content_type_id=2).update(content_type=ContentType.objects.get(app_label='wagtailcore', model='page')) 

這將轉換相關頁面（S）爲鶺鴒的基本的「頁面」類型（其中沒有「標題」以外的內容字段） - 然後您可以繼續並刪除此頁面。