Django-jet: TemplateDoesNotExist: admin/breadcrumbs.html

[imdario]

I updated from Django JET 0.1.4 (with Django 1.9.7) to JET 0.9.0 (Django 1.10) and I get this error:

Environment:

Request Method: POST
Request URL: http://127.0.0.1:8000/admin/manager/devices/2/

Django Version: 1.10
Python Version: 2.7.9
Installed Applications:
['manager',
'jet.dashboard',
'jet',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles']
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.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']

Template loader postmortem
Django tried loading these templates, in this order:

Using engine django:
* django.template.loaders.app_directories.Loader: D:\Workspace\DeviceManager\dm-web\manager\templates\admin\breadcrumbs.html (Source does not exist)
* django.template.loaders.app_directories.Loader: d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\jet\dashboard\templates\admin\breadcrumbs.html (Source does not exist)
* django.template.loaders.app_directories.Loader: d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\jet\templates\admin\breadcrumbs.html (Source does not exist)
* django.template.loaders.app_directories.Loader: d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\contrib\admin\templates\admin\breadcrumbs.html (Source does not exist)
* django.template.loaders.app_directories.Loader: d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\contrib\auth\templates\admin\breadcrumbs.html (Source does not exist)

Template error:
In template D:\Workspace\DeviceManager\dm-web\manager\templates\manager\view_device.html, error at line 0
admin/breadcrumbs.html 1 : {% extends "admin/change_form.html" %}
2 : {% load i18n admin_urls static admin_modify manager_tags %}
3 :
4 : {% block extrahead %}{{ block.super }}
5 :
6 : {% endblock %}
7 :
8 : {% if not is_popup %}
9 : {% block breadcrumbs %}
10 :

Traceback:

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\core\handlers\exception.py" in inner

1. response = get_response(request)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\core\handlers\base.py" in _legacy_get_response

1. response = self._get_response(request)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\core\handlers\base.py" in _get_response

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

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\core\handlers\base.py" in _get_response

1. response = wrapped_callback(request, _callback_args, *_callback_kwargs)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\utils\decorators.py" in _wrapped_view

1. response = view_func(request, _args, *_kwargs)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func

1. response = view_func(request, _args, *_kwargs)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\contrib\admin\sites.py" in inner

1. return view(request, _args, *_kwargs)

File "D:\Workspace\DeviceManager\dm-web\manager\admin.py" in show_view

1. RequestContext(request))

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\shortcuts.py" in render_to_response

1. content = loader.render_to_string(template_name, context, using=using)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\loader.py" in render_to_string

1. return template.render(context, request)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\backends\django.py" in render

1. reraise(exc, self.backend)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\backends\django.py" in reraise

1. six.reraise(exc.class, new, sys.exc_info()[2])

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\backends\django.py" in render

1. return self.template.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. return self._render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in _render

1. return self.nodelist.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. bit = node.render_annotated(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render_annotated

1. return self.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\loader_tags.py" in render

1. return compiled_parent._render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in _render

1. return self.nodelist.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. bit = node.render_annotated(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render_annotated

1. return self.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\loader_tags.py" in render

1. return compiled_parent._render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in _render

1. return self.nodelist.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. bit = node.render_annotated(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render_annotated

1. return self.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\loader_tags.py" in render

1. return compiled_parent._render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in _render

1. return self.nodelist.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. bit = node.render_annotated(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render_annotated

1. return self.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\loader_tags.py" in render

1. result = block.nodelist.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. bit = node.render_annotated(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render_annotated

1. return self.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\loader_tags.py" in render

1. result = block.nodelist.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. bit = node.render_annotated(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render_annotated

1. return self.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\defaulttags.py" in render

1. return nodelist.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. bit = node.render_annotated(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render_annotated

1. return self.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\loader_tags.py" in render

1. result = block.nodelist.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render

1. bit = node.render_annotated(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\base.py" in render_annotated

1. return self.render(context)

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\jet\templatetags\jet_tags.py" in render

1. t = loader.get_template('admin/breadcrumbs.html')

File "d:\Workspace\DeviceManager\dm-web.env\lib\site-packages\django\template\loader.py" in get_template

1. raise TemplateDoesNotExist(template_name, chain=chain)

Exception Type: TemplateDoesNotExist at /admin/manager/devices/2/
Exception Value: admin/breadcrumbs.html

As you can see, the template "admin/breadcrumbs.html" is loaded from FormatBreadcrumbsNode class, which is instanced in format_breadcrumbs.

I checked Django 1.9.7 and Django JET 0.1.4 templates looking for it. I found admin/breadcrumbs.html in JET 0.1.4. In JET 0.9.0 this template just disappeared (and it isn't in Django 1.10), turning the tag format_breadcrumbs unusable.

Please, can you check it?

PS: I just tried to copy the old template in my app's template directory and it just worked.

[f1nality]

Hello @imdario !

0.9.0 is a major update which tries to maximally decrease number of template overrides and stick to django layout. So now it doesn't modify breadcrumbs with format_breadcrumbs tag. Btw I have forgotten to delete it completely.

In your templates\manager\view_device.html file you are using format_breadcrumbs tag as far as i understood. So a correct way to resolve this issue is to remove format_breadcrumbs tag at all and make breadcrumbs block look the same way as default django.

[SalahAdDin]

@f1nality Hey man, you have to update documentation hehehehehhe

[imdario]

In your templates\manager\view_device.html file you are using format_breadcrumbs tag as far as i understood.

As far as I checked, I don't use it directly. Tomorrow I'll fix some post-migration "quirks" so I'll check it again (and hopefully find it).

[f1nality]

@imdario have you checked for format_breadcrumbs usage? Btw 0.9.1 update doesn't include format_breadcrumbs tag.

[imdario]

Yes, I have. It was called in a template I override. I just missed it while checking previously.

Thanks for your time. Update 0.9.1 looks good!