index = models.IntegerField(_('index'), default=0)
file = models.FileField(_('file'), max_length=600, upload_to=_file_upload_to, storage=OverwriteStorage())
uploaded_at = models.DateTimeField(_('creation date'), auto_now_add=True, editable=False, db_index=True)
+ project_description = models.CharField(max_length=2048, blank=True)
+ project_icon = models.CharField(max_length=2048, blank=True)
extra_info = models.TextField(_('extra information'), default='{}', editable=False)
book = models.ForeignKey('Book', models.CASCADE, related_name='media')
source_sha1 = models.CharField(null=True, blank=True, max_length=40, editable=False)