- book_record = models.ForeignKey(BookPublishRecord, verbose_name=_('book publish record'))
- change = models.ForeignKey(Chunk.change_model, related_name='publish_log', verbose_name=_('change'))
+ book_record = models.ForeignKey(BookPublishRecord, models.CASCADE, verbose_name=_('book publish record'))
+ change = models.ForeignKey(Chunk.change_model, models.CASCADE, related_name='publish_log', verbose_name=_('change'))