Postgresql 摇尾断言错误“；不匹配标签：预期img，获得p“；

我正在Docker中使用Postgres db运行Wagtail 2.4，当我尝试在Wagtail中编辑博客文章时出错。最初的帖子很有效，我可以在网站上很好地查看页面。当我在Wagtail admin中编辑帖子时，它抛出一个500错误：

AssertionError“Unmatched tags:expected img，get p”

我最初认为这个问题是因为博客文章最初是从另一个数据库（旧Drupal站点）导入的，

intro

和

body

字段包含图像标记，即使intro根本不应该有任何HTML标记。但是，我使用Navicat在db中删除了它们，错误仍然存在。我不确定还可以尝试什么，但我可以确认，并不是所有的帖子都在编辑视图中出错，只是从Drupal导入的帖子。在Wagtail管理中添加的任何更新内容都可以

模型如下所示：

class NewsPage(Page):    
    main_image = models.ForeignKey('wagtailimages.Image', null=True, blank=True,
                                    on_delete=models.SET_NULL, related_name='+')
    date = models.DateTimeField(default=datetime.datetime.today)
    category = models.CharField(max_length=50, choices=CATEGORIES)
    intro = models.TextField()
    body = RichTextField(blank=True)
    search_keywords = models.TextField(blank=True, null=True)

    search_fields = Page.search_fields + [
        index.SearchField('intro'),
        index.SearchField('body'),
    ]

    content_panels = Page.content_panels + [
        ImageChooserPanel('main_image'),
        FieldPanel('category'),
        FieldPanel('intro'),
        FieldPanel('body', classname='full'),
    ]

    promote_panels = Page.promote_panels + [
        FieldPanel('search_keywords'),
    ]

    settings_panels = Page.settings_panels + [
        FieldPanel('date'),
    ]

    @property
    def news_index_page(self):
        return self.get_parent().specific

    def get_context(self, request, *args, **kwargs):
        context = super(NewsPage, self).get_context(request, *args, **kwargs)
        context['news_index_page'] = self.news_index_page
        context['news'] = self
        return context

回溯：

Traceback:

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
  34.             response = get_response(request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  115.                 response = self.process_exception_by_middleware(e, request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  113.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  44.         response = view_func(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/urls/__init__.py" in wrapper
  102.             return view_func(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/decorators.py" in decorated_view
  34.             return view_func(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/views/pages.py" in edit
  545.         'has_unsaved_changes': has_unsaved_changes,

File "/usr/local/lib/python3.6/site-packages/django/shortcuts.py" in render
  36.     content = loader.render_to_string(template_name, context, request, using=using)

File "/usr/local/lib/python3.6/site-packages/django/template/loader.py" in render_to_string
  62.     return template.render(context, request)

File "/usr/local/lib/python3.6/site-packages/django/template/backends/django.py" in render
  61.             return self.template.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  171.                     return self._render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _render
  163.         return self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
  150.             return compiled_parent._render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _render
  163.         return self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
  150.             return compiled_parent._render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _render
  163.         return self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
  150.             return compiled_parent._render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _render
  163.         return self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
  62.                 result = block.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
  62.                 result = block.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  987.             output = self.filter_expression.resolve(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
  671.                 obj = self.var.resolve(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
  796.             value = self._resolve_lookup(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _resolve_lookup
  858.                             current = current()

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/edit_handlers.py" in render_form_content
  252.         return mark_safe(self.render_as_object() + self.render_missing_fields())

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/edit_handlers.py" in render_as_object
  220.         return self.render()

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/edit_handlers.py" in render
  324.             'self': self

File "/usr/local/lib/python3.6/site-packages/django/template/loader.py" in render_to_string
  62.     return template.render(context, request)

File "/usr/local/lib/python3.6/site-packages/django/template/backends/django.py" in render
  61.             return self.template.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  171.                     return self._render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _render
  163.         return self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/defaulttags.py" in render
  209.                     nodelist.append(node.render_annotated(context))

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  987.             output = self.filter_expression.resolve(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
  671.                 obj = self.var.resolve(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
  796.             value = self._resolve_lookup(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _resolve_lookup
  858.                             current = current()

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/edit_handlers.py" in render_as_object
  220.         return self.render()

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/edit_handlers.py" in render
  324.             'self': self

File "/usr/local/lib/python3.6/site-packages/django/template/loader.py" in render_to_string
  62.     return template.render(context, request)

File "/usr/local/lib/python3.6/site-packages/django/template/backends/django.py" in render
  61.             return self.template.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  171.                     return self._render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _render
  163.         return self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/defaulttags.py" in render
  209.                     nodelist.append(node.render_annotated(context))

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  987.             output = self.filter_expression.resolve(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
  671.                 obj = self.var.resolve(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
  796.             value = self._resolve_lookup(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _resolve_lookup
  858.                             current = current()

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/edit_handlers.py" in render_as_object
  482.             'field': self.bound_field,

File "/usr/local/lib/python3.6/site-packages/django/template/loader.py" in render_to_string
  62.     return template.render(context, request)

File "/usr/local/lib/python3.6/site-packages/django/template/backends/django.py" in render
  61.             return self.template.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  171.                     return self._render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _render
  163.         return self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
  188.             return template.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  173.                 return self._render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in _render
  163.         return self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/loader_tags.py" in render
  53.                 result = self.nodelist.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  937.                 bit = node.render_annotated(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_annotated
  904.             return self.render(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  987.             output = self.filter_expression.resolve(context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in resolve
  698.                 new_obj = func(obj, *arg_vals)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/templatetags/wagtailadmin_tags.py" in render_with_errors
  251.         return bound_field.as_widget()

File "/usr/local/lib/python3.6/site-packages/django/forms/boundfield.py" in as_widget
  93.             renderer=self.form.renderer,

File "/usr/local/lib/python3.6/site-packages/django/forms/widgets.py" in render
  241.         context = self.get_context(name, value, attrs)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/rich_text/editors/draftail/__init__.py" in get_context
  62.         context = super().get_context(name, value, attrs)

File "/usr/local/lib/python3.6/site-packages/django/forms/widgets.py" in get_context
  293.         context = super().get_context(name, value, attrs)

File "/usr/local/lib/python3.6/site-packages/django/forms/widgets.py" in get_context
  233.             'value': self.format_value(value),

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/rich_text/editors/draftail/__init__.py" in format_value
  59.         return self.converter.from_database_format(value)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/rich_text/converters/contentstate.py" in from_database_format
  84.         self.html_to_contentstate_handler.feed(html)

File "/usr/local/lib/python3.6/html/parser.py" in feed
  111.         self.goahead(0)

File "/usr/local/lib/python3.6/html/parser.py" in goahead
  173.                     k = self.parse_endtag(i)

File "/usr/local/lib/python3.6/html/parser.py" in parse_endtag
  421.         self.handle_endtag(elem.lower())

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/rich_text/converters/html_to_contentstate.py" in handle_endtag
  313.         assert name == expected_name, "Unmatched tags: expected %s, got %s" % (expected_name, name)

Exception Type: AssertionError at /admin/pages/2251/edit/
Exception Value: Unmatched tags: expected img, got p 

---

问题是Wagtail的解析器不能容忍格式错误的HTML，并且从Drupal导入的HTML格式错误（例如，它包含未关闭的标记）。这是一个有点恼人的Wagtail编辑器打破了这一点，因为你没有办法修复编辑器的内容

在过去，我所做的就是修复shell中糟糕的HTML，使用HTML解析器，比如。大致如下：

from bs4 import BeautifulSoup

for page in NewsPage.objects.all():
    html = page.body
    soup = BeautifulSoup(html, 'html5lib')
    cleaned_html = soup.body.decode_contents()
    page.body = cleaned_html
    page.save()

---

decode_contents（）

将生成Wagtail解析器不会抱怨的有效HTML。

问题是Wagtail解析器不能容忍格式错误的HTML，并且您从Drupal导入的HTML格式错误（例如，它包含未关闭的标记）。这是一个有点恼人的Wagtail编辑器打破了这一点，因为你没有办法修复编辑器的内容

在过去，我所做的就是修复shell中糟糕的HTML，使用HTML解析器，比如。大致如下：

from bs4 import BeautifulSoup

for page in NewsPage.objects.all():
    html = page.body
    soup = BeautifulSoup(html, 'html5lib')
    cleaned_html = soup.body.decode_contents()
    page.body = cleaned_html
    page.save()

---

decode_contents（）

将生成Wagtail解析器不会抱怨的有效HTML。

我的解决方案如下：

from bs4 import BeautifulSoup

for page in NewsPage.objects.all():
    html = page.body
    soup = BeautifulSoup(html, "html.parser")
    if soup.find("img"):
        soup.img.decompose()

    page.body = soup
    page.save_revision().publish()

---

我最终有效的解决方案如下：

from bs4 import BeautifulSoup

for page in NewsPage.objects.all():
    html = page.body
    soup = BeautifulSoup(html, "html.parser")
    if soup.find("img"):
        soup.img.decompose()

    page.body = soup
    page.save_revision().publish()

---

非常感谢。我正在研究使用BeautifulSoup来完全删除img标记，它工作得很好，因为我可以看到它们在数据库中被删除了。然而，我仍然在Wagtail中的编辑视图中发现错误，我想知道它是否只是因为某种原因无法识别数据库中的更改？删除

img

标记是不够的-您需要清除所有格式错误的HTML-例如未关闭的

p

标记等，如果你来自Drupal，你可能会有很多。问题是，不仅页面本身需要清理，而且

wagtailcore\u pagerevision

表中的json也需要清理。这就是编辑视图正在加载的内容。谢谢！我正在研究使用BeautifulSoup来完全删除img标记，它工作得很好，因为我可以看到它们在数据库中被删除了。然而，我仍然在Wagtail中的编辑视图中发现错误，我想知道它是否只是因为某种原因无法识别数据库中的更改？删除

img

标记是不够的-您需要清除所有格式错误的HTML-例如未关闭的

p

标记等，如果你来自Drupal，你可能会有很多。问题是，不仅页面本身需要清理，而且

wagtailcore\u pagerevision

表中的json也需要清理。这就是编辑视图正在加载的内容。