snippets.json

{

    "delete model file on change": {
        "prefix": ["modfile", "model-file-change-delete"],
        "body": [
            "@receiver(models.signals.post_delete, sender=${1:model})",
            "def auto_delete_${1:model}_${2:field}_on_delete(sender, instance, **kwargs):",
            "    if instance.${2:field}:",
            "        try:",
            "            if os.path.isfile(instance.${2:field}.path):",
            "                os.remove(instance.${2:field}.path)",
            "        except:",
            "            ${0:pass}",
            "",
            "@receiver(models.signals.post_delete, sender=${1:model})",
            "def auto_delete_${1:model}_${2:field}_on_change(sender, instance, **kwargs):",
            "    if not instance.pk:",
            "        instance.${2:field} = compress(instance.${2:field})",
            "        return False",
            "    try:",
            "        old_file = sender.objects.get(pk=instance.pk).${2:field}",
            "    except sender.DoesNotExist:",
            "        return False",
            "    try:",
            "        new_file = instance.${2:field}",
            "        if not old_file == new_file:",
            "            if os.path.isfile(old_file.path):",
            "                os.remove(old_file.path)",
            "                instance.${2:field} = compress(instance.${2:field})",
            "    except:",
            "        ${0:pass}"
        ],
        "description": "delete models file when model file changed!"
    }

}