UnknownBackendException in template

[yetty]

Malek Yala wrote:

Hey troubles with django-embed-video

It works very well when I want to have a video but when I leave the urlfield blank I get an UnknownBackenExeption error. I have added blank=True, tried Null=True, required=false, but my blog model doesn't seem allow me to NOT have an embed.

Please Help, Malek

Environment:

Request Method: GET
Request URL: ****

Django Version: 1.6.2
Python Version: 2.7.3
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'filebrowser',
 'django.contrib.admin',
 'south',
 'taggit',
 'file_picker',
 'file_picker.uploads',
 'file_picker.wymeditor',
 'bootstrap_toolkit',
 'social_poster',
 'imagekit',
 'collage',
 'PIL',
 'markdown',
 'photologue',
 'django_evolution',
 'admin_honeypot',
 'dbbackup',
 's3_folder_storage',
 'disqus',
 'django_social_share',
 'django_bitly',
 'taggit_templatetags',
 'easy_thumbnails',
 'optimizations',
 'responsive_images',
 'embed_video',
 'filebrowser',
 'tinymce',
 'blog',
 'gallery',
 'home',
 'contact',
 'debug_toolbar')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'debug_toolbar.middleware.DebugToolbarMiddleware')

Template error:
In template /www/mysite/mysite/templates/blog.html, error at line 33
   (Could not get exception message)
   23 :                         <p class="p2">{{blog.perex|safe}}</p>    

   24 :                             <div class="row">

   25 :                             

   26 : 

   27 : 

   28 : 

   29 : 

   30 : 

   31 : 

   32 : 

   33 :      {% video blog.embed "420x300" %} 

   34 :                                                                                                              </div>

   35 : <p class="p2">{{blog.content|safe}}</p>

   36 :   <div class="row">

   37 : 

   38 : 

   39 :     

   40 :     </div>

   41 :         {% include "share.html" %}

   42 : 

   43 : 

Traceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
  139.                 response = response.render()
File "/usr/local/lib/python2.7/dist-packages/django/template/response.py" in render
  105.             self.content = self.rendered_content
File "/usr/local/lib/python2.7/dist-packages/django/template/response.py" in rendered_content
  82.         content = template.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  140.             return self._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/test/utils.py" in instrumented_test_render
  85.     return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py" in render
  123.         return compiled_parent._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/test/utils.py" in instrumented_test_render
  85.     return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py" in render
  62.             result = block.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py" in render
  840.                 bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py" in render_node
  78.             return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/embed_video/templatetags/embed_video_tags.py" in render
  71.             return self.__render_embed(url, context)
File "/usr/local/lib/python2.7/dist-packages/embed_video/templatetags/embed_video_tags.py" in __render_embed
  77.         return self.embed(url, size, context=context)
File "/usr/local/lib/python2.7/dist-packages/embed_video/templatetags/embed_video_tags.py" in embed
  101.         backend = VideoNode.get_backend(url, context=context)
File "/usr/local/lib/python2.7/dist-packages/embed_video/templatetags/embed_video_tags.py" in get_backend
  90.             backend = detect_backend(backend)
File "/usr/local/lib/python2.7/dist-packages/embed_video/backends.py" in detect_backend
  39.     raise UnknownBackendException

Exception Type: UnknownBackendException at /blog/tested/
Exception Value:

[yetty]

Hi,

thank you for bug reporting. This issue will be fixed in next version od django-embed-video, the release is planned to the next week.

If you can't wait, there is a simple quick fix - just check if video is not empty in your templates:

{% if blog.embed %}
    {% video blog.embed "420x300" %} 
{% endif %}

I hope it'll help you.