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'NoneType' object has no attribute 'text'

See original GitHub issue

Found a bug? Please fill out the sections below. 👍

Issue Summary

We recently upgraded a site to 2.1 and pretty much everything worked (with the steps in the migration guide) but we do have one page type returning an error when we attempt to edit it. Viewing it live works fine.

This is a custom page type that has a StreamField where the editors place custom blocks. Based on the stack trace I’m guessing we have no data in one of them which is causing the problem but I’m not sure how to track it down.

Any thoughts?

Stack Trace

Environment:


Request Method: GET
Request URL: [redacted]/admin/pages/292/edit/

Django Version: 1.11.11
Python Version: 3.6.5
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'taggit',
 'compressor',
 'modelcluster',
 'storages',
 'widget_tweaks',
 'bootstrap3',
 'raven.contrib.django.raven_compat',
 'adminsortable',
 'wagtail.contrib.forms',
 'wagtail.contrib.redirects',
 'wagtail.embeds',
 'wagtail.sites',
 'wagtail.users',
 'wagtail.snippets',
 'wagtail.documents',
 'wagtail.images',
 'wagtail.search',
 'wagtail.admin',
 'wagtail.core',
 'wagtail.contrib.search_promotions',
 'home',
 'landing',
 'industry',
 'contact',
 'blog',
 'seo',
 'careers',
 'customer',
 'training',
 'downloads',
 'startup',
 'playlist')
Installed Middleware:
('raven.contrib.django.middleware.DjangoRestFrameworkCompatMiddleware',
 'raven.contrib.django.middleware.SentryMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware',
 'wagtail.core.middleware.SiteMiddleware',
 'wagtail.contrib.redirects.middleware.RedirectMiddleware')


Template error:
In template /usr/local/lib/python3.6/site-packages/wagtail/admin/templates/wagtailadmin/block_forms/sequence_member.html, error at line 23
   'NoneType' object has no attribute 'text'   13 : 
   14 : {% endcomment %}
   15 : <li id="{{ prefix }}-container" class="sequence-member">
   16 :     <input type="hidden" id="{{ prefix }}-deleted" name="{{ prefix }}-deleted" value="">
   17 :     <input type="hidden" id="{{ prefix }}-order" name="{{ prefix }}-order" value="{{ index }}">
   18 :     
   19 :     {% block hidden_fields %}{% endblock %}
   20 : 
   21 :     {% block header_controls %}{% endblock %}
   22 : 
   23 :     <div class="sequence-member-inner {% block sequence_member_inner_classes %}{% endblock %}"> {{ child.render_form }} </div>
   24 : 
   25 :     {% block footer_controls %}{% endblock %}
   26 : </li>
   27 : 

Traceback:

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

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

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

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

File "/usr/local/lib/python3.6/site-packages/django/views/decorators/cache.py" in _cache_controlled
  43.             response = viewfunc(request, *args, **kw)

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
  534.         'has_unsaved_changes': has_unsaved_changes,

File "/usr/local/lib/python3.6/site-packages/django/shortcuts.py" in render
  30.     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
  68.     return template.render(context, request)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  1040.             output = self.filter_expression.resolve(context)

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

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

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

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/edit_handlers.py" in render_form_content
  230.         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
  198.         return self.render()

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

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

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

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

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

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

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

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

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

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  1040.             output = self.filter_expression.resolve(context)

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

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

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

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

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

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

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

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

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

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

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

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

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

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  1040.             output = self.filter_expression.resolve(context)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  1040.             output = self.filter_expression.resolve(context)

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

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

File "/usr/local/lib/python3.6/site-packages/django/forms/boundfield.py" in as_widget
  127.             **kwargs

File "/usr/local/lib/python3.6/site-packages/wagtail/core/blocks/base.py" in render
  505.         return self.render_with_errors(name, value, attrs=attrs, errors=None)

File "/usr/local/lib/python3.6/site-packages/wagtail/core/blocks/base.py" in render_with_errors
  502.         return mark_safe(bound_block.render_form() + js_snippet)

File "/usr/local/lib/python3.6/site-packages/wagtail/core/blocks/base.py" in render_form
  417.         return self.block.render_form(self.value, self.prefix, errors=self.errors)

File "/usr/local/lib/python3.6/site-packages/wagtail/core/blocks/stream_block.py" in render_form
  140.             for (i, child) in enumerate(valid_children)

File "/usr/local/lib/python3.6/site-packages/wagtail/core/blocks/stream_block.py" in <listcomp>
  140.             for (i, child) in enumerate(valid_children)

File "/usr/local/lib/python3.6/site-packages/wagtail/core/blocks/stream_block.py" in render_list_member
  77.             'block_id': id,

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

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

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

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

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

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

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

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

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

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

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render
  1040.             output = self.filter_expression.resolve(context)

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

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

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

File "/usr/local/lib/python3.6/site-packages/wagtail/core/blocks/base.py" in render_form
  417.         return self.block.render_form(self.value, self.prefix, errors=self.errors)

File "/usr/local/lib/python3.6/site-packages/wagtail/core/blocks/field_block.py" in render_form
  37.             widget_html = widget.render(prefix, field_value, attrs=widget_attrs)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/rich_text/editors/draftail/__init__.py" in render
  52.         translated_value = self.translate_value(value)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/rich_text/editors/draftail/__init__.py" in translate_value
  44.         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
  305.             element_handler.handle_endtag(name, self.state, self.contentstate)

File "/usr/local/lib/python3.6/site-packages/wagtail/admin/rich_text/converters/html_to_contentstate.py" in handle_endtag
  192.         entity_range.length = len(state.current_block.text) - entity_range.offset

Exception Type: AttributeError at /admin/pages/292/edit/
Exception Value: 'NoneType' object has no attribute 'text'

Technical details

  • Python version: 3.6.5.
  • Django version: 1.11.11.
  • Wagtail version: 2.1.
  • Browser version: N/A.

Issue Analytics

  • State:closed
  • Created 5 years ago
  • Comments:21 (5 by maintainers)

github_iconTop GitHub Comments

4reactions
pjstevnscommented, Feb 13, 2019

A monkey patch on 2.2.2 provides a work-around:

from django.apps import AppConfig                                               
from django.utils.translation import ugettext_lazy as _                         


def InlineStyleElementHandler__handle_endtag(self, name, state, contentstate): 
    inline_style_range = state.current_inline_styles.pop()
    assert inline_style_range.style == self.style
    try:
        inline_style_range.length = (
            len(state.current_block.text) - inline_style_range.offset
        )
    except AttributeError:
        inline_style_range.length = inline_style_range.offset


def BlockElementHandler__handle_endtag(self, name, state, contentState):
    state.current_block = None


class LibConfig(AppConfig):
    label = "lib"
    name = "mysitei.lib"
    verbose_name = _("Library")
                                                                                    
    def ready(self):
        from wagtail.admin.rich_text.converters.html_to_contentstate import (
            InlineStyleElementHandler,
            BlockElementHandler
        )

        InlineStyleElementHandler.handle_endtag = (
            InlineStyleElementHandler__handle_endtag
        )
        BlockElementHandler.handle_endtag = (
            BlockElementHandler__handle_endtag
        )
3reactions
lolegcommented, Jul 14, 2021

When 3 year old issues like this get closed, everyone involved should get a slice of (delicious, and moist) cake. 🍰

Read more comments on GitHub >

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