Documentos de captura não estão sendo apagados quando uma captura é apagada

[felubra]

Solução: usar handler num sinal para apagar esses documentos:

@receiver(post_delete)
def delete_associated_documents(sender, **kwargs):
    instance = kwargs['instance']

    if hasattr(instance, '_delete_in_signal'):
        return

    if isinstance(instance, (NewsPDFCapture,)) or isinstance(instance, (NewsImageCapture,)):
        try:
            instance._delete_in_signal = True
            if isinstance(instance, (NewsPDFCapture)):
                instance.pdf_document.delete()
            else:
                instance.image_document.delete()
        finally:
            if hasattr(instance, '_delete_in_signal'):
                del instance._delete_in_signal