Django 2.1.2 update, admin interface broken: render() got an unexpected keyword argument 'renderer'

[Aileen]

Hello,

After upgrading Django from 2.0.8 to 2.1.2, the admin interface no longer seems to work due to some problems with our widgets. This is the error that I get:

And here is the full call stack:

Environment:


Request Method: GET
Request URL: http://localhost:8000/admin/website/person/2/change/

Django Version: 2.1.2
Python Version: 3.6.3
Installed Applications:
['website.apps.WebsiteConfig',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django_extensions',
 'image_cropping',
 'easy_thumbnails',
 'sortedm2m',
 'sortedm2m_filter_horizontal_widget',
 'rest_framework']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']


Template error:
In template /usr/local/lib/python3.6/site-packages/django/contrib/admin/templates/admin/includes/fieldset.html, error at line 19
   render() got an unexpected keyword argument 'renderer'
   9 :             {% for field in line %}
   10 :                 <div{% if not line.fields|length_is:'1' %} class="fieldBox{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}{% if field.field.is_hidden %} hidden{% 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 :                             <div class="readonly">{{ field.contents }}</div>
   18 :                         {% else %}
   19 :                              {{ field.field }} 
   20 :                         {% endif %}
   21 :                     {% endif %}
   22 :                     {% if field.field.help_text %}
   23 :                         <div class="help">{{ field.field.help_text|safe }}</div>
   24 :                     {% endif %}
   25 :                 </div>
   26 :             {% endfor %}
   27 :         </div>
   28 :     {% endfor %}
   29 : </fieldset>


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
  156.                 response = self.process_exception_by_middleware(e, request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  154.                 response = response.render()

File "/usr/local/lib/python3.6/site-packages/django/template/response.py" in render
  106.             self.content = self.rendered_content

File "/usr/local/lib/python3.6/site-packages/django/template/response.py" in rendered_content
  83.         content = template.render(context, self._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
  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/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/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/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/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/defaulttags.py" in render
  309.                 return 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
  309.                 return 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
  993.         return render_value_in_context(output, context)

File "/usr/local/lib/python3.6/site-packages/django/template/base.py" in render_value_in_context
  972.             value = str(value)

File "/usr/local/lib/python3.6/site-packages/django/utils/html.py" in <lambda>
  397.     klass.__str__ = lambda self: mark_safe(klass_str(self))

File "/usr/local/lib/python3.6/site-packages/django/forms/boundfield.py" in __str__
  33.         return self.as_widget()

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

Exception Type: TypeError at /admin/website/person/2/change/
Exception Value: render() got an unexpected keyword argument 'renderer'

It seems like downgrading to 2.0.8 temporarily fixes our problem, but I was wondering if there is a better fix that allows us to have 2.1.2 + a working admin interface?

Thanks.

[carlos]

yes verison 2.1 remove see this link

https://docs.djangoproject.com/en/dev/internals/deprecation/#deprecation-removed-in-2-1

you need update you code in widget part.

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att.

Carlos Rocha

[Aileen]

Thanks for the response! Which lines of the widget code should we update? We are also using Docker to host our Django dev/production environments - is there a way to update widget code that will persist between builds?

[carlos]

Hi, many third party app same error for example django-autocomplete-light, this solution

https://github.com/stuartaccent/django-autocomplete-light/commit/cfc5f4a25fcb4937cf07fc65ef4ed549ca0d1338

add renderer parameter in the function render this solve the problem .

you need find in you widget app the correct function and add this new parameter

Cheers

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att.

Carlos Rocha