#urls
          url(r'^media/images/(?P<rel_model_tag>(event|member|crag))/(?P<rel_object_id>\d+)/(?P<action>(view|edit))/$', views.video_list, name='image-list')
          url(r'^media/videos/(?P<rel_model_tag>(event|member|crag))/(?P<rel_object_id>\d+)/(?P<action>(view|edit))/$', views.image_list, name='video-list')


    #views
    def image_list(request, rel_model_tag, rel_object_id, action):
        return media_list(request, Image, rel_model_tag, rel_object_id, action)


    def video_list(request, rel_model_tag, rel_object_id, action):
        return media_list(request, Video, rel_model_tag, rel_object_id, action)


    def media_list(request, model, rel_model_tag, rel_object_id, action):
        rel_model = tag_to_model(rel_model_tag)
        rel_object = get_object_or_404(rel_model, pk=rel_object_id)

        if model == Image:
            star_media = rel_object.star_image
        else:
            star_media = rel_object.star_video

        filter_params = {}
        if rel_model == Event:
            filter_params['media__event'] = rel_object_id
        elif rel_model == Member:
            filter_params['media__members'] = rel_object_id
        elif rel_model == Crag:
            filter_params['media__crag'] = rel_object_id

        media_list = model.objects.filter(~Q(id=star_media.id)).filter(**filter_params).order_by('media__date_added').all()

        context = {
            'media_list': media_list,
            'star_media': star_media,
        }

        if action == 'edit':
            return media_edit_list(request, model, rel_model_tag, rel_model_id, context)

        return media_view_list(request, model, rel_model_tag, rel_model_id, context)



  def media_view_list(request, model, rel_model_tag, rel_object_id, context):
      if request.is_ajax():
          context['base_template'] = 'boxes/base-lite.html'
      return render(request, 'media/list-items.html', context)


  def media_edit_list(request, model, rel_model_tag, rel_object_id, context):
      if model == Image:
          get_media_record = get_image_record
      else:
          get_media_record = get_video_record

      media_list = [get_media_record(media, rel_model_tag, rel_object_id) for media in context['media_list']]

      if context['star_media']:
          star_media = get_media_record(star_media, rel_model_tag, rel_object_id)
          star_media['starred'] = True
      else:
          star_media = None

      json = simplejson.dumps({
          'star_media': star_media,
          'media_list': media_list,
      })
      return HttpResponse(json, content_type=json_response_mimetype(request))

    # models
    class Media(models.Model, WebModel):
        title = models.CharField('title', max_length=128, default='', db_index=True, blank=True)
        event = models.ForeignKey(Event, null=True, default=None, blank=True)
        crag = models.ForeignKey(Crag, null=True, default=None, blank=True)
        members = models.ManyToManyField(Member, blank=True)
        added_by = models.ForeignKey(Member, related_name='added_images')
        date_added = models.DateTimeField('date added', auto_now_add=True, null=True, default=None, editable=False)

        def __unicode__(self):
            return self.title

        def get_absolute_url(self):
            return self.image.url if self.image else self.video.embed_url


    class Image(Media):
        image = ProcessedImageField(upload_to='uploads',
                                    processors=[ResizeToFit(width=1024, height=1024, upscale=False)],
                                    format='JPEG',
                                    options={'quality': 75})
        thumbnail_1 = ImageSpecField(source='image',
                                    processors=[SmartResize(width=178, height=134)],
                                    format='JPEG',
                                    options={'quality': 75})
        thumbnail_2 = ImageSpecField(source='image',
                                    #processors=[SmartResize(width=256, height=192)],
                                    processors=[ResizeToFit(height=164)],
                                    format='JPEG',
                                    options={'quality': 75})


    class Video(Media):
        url = models.URLField('url', max_length=256, default='')
        embed_url = models.URLField('embed url', max_length=256, default='', blank=True)
        author = models.CharField('author', max_length=64, default='', blank=True)
        thumbnail = ProcessedImageField(upload_to='uploads',
                                    processors=[ResizeToFit(width=1024, height=1024, upscale=False)],
                                    format='JPEG',
                                    options={'quality': 75}, null=True, default=None, blank=True)
        thumbnail_1 = ImageSpecField(source='thumbnail',
                                    processors=[SmartResize(width=178, height=134)],
                                    format='JPEG',
                                    options={'quality': 75})
        thumbnail_2 = ImageSpecField(source='thumbnail',
                                    #processors=[SmartResize(width=256, height=192)],
                                    processors=[ResizeToFit(height=164)],
                                    format='JPEG',
                                    options={'quality': 75})

      class Crag(models.Model, WebModel):
          name = models.CharField('name', max_length=64, default='', db_index=True)
          normalized_name = models.CharField('normalized name', max_length=64, default='', editable=False)
          type = models.IntegerField('crag type', null=True, default=None, choices=crag_types)
          description = models.TextField('description', default='', blank=True)
          country = models.ForeignKey('country', null=True, default=None) #TODO: make this not null when db enables it
          latitude = models.FloatField('latitude', null=True, default=None)
          longitude = models.FloatField('longitude', null=True, default=None)
          location_index = FixedCharField('location index', length=24, default='', editable=False, db_index=True) # handled by db, used for marker clustering
          added_by = models.ForeignKey('member', null=True, default=None)
          #route_count = models.IntegerField('route count', null=True, default=None, editable=False)
          date_created = models.DateTimeField('date created', auto_now_add=True, null=True, default=None, editable=False)
          last_modified = models.DateTimeField('last modified', auto_now=True, null=True, default=None, editable=False)
          star_image = models.OneToOneField('Image', null=True, default=None, related_name='star_crags', on_delete=models.SET_NULL)
          star_video = models.OneToOneField('Video', null=True, default=None, related_name='star_crags', on_delete=models.SET_NULL)