【Django】 file文件问题处理

1. 文件上传的路径, 自定义

图片和视频分类存放, 以时间日期分文件夹存放

# 自定义 文件上传的路径
def upload_to(instance, filename):
    now_date = datetime.now().date()
    year, month, day = [str(now_date.year), str(now_date.month), str(now_date.day)]
    if instance.type == '0':
        return os.path.join('photos', year, month, day, filename)
    elif instance.type == '1':
        return os.path.join('videos', year, month, day, filename)


class AffixFile(models.Model):
    """
    附件表
    """
    file = models.FileField(upload_to=upload_to, null=True)
    affix_type = (('0', '图片'), ('1', '视频'))
    type = models.CharField('附件类型', max_length=32, choices=affix_type, default='0')
    publish_time = models.DateTimeField('上传时间', auto_now_add=True)

2. 在admin后端删除文件对象时, 同时删除服务器上的文件

from django.conf import settings
from django.dispatch import receiver
from django.db.models.signals import post_delete

@receiver(post_delete, sender=AffixFile)
def delete_upload_files(sender, instance, **kwargs):
    files = getattr(instance, 'file')  # 文件对象, 字段名
    if not files:
        return
    file_name = os.path.join(settings.MEDIA_ROOT, str(files))
    if os.path.isfile(file_name):
	os.remove(file_name)