在Django中,我有以下型号:Django:如何替换/覆盖/更新/更改FileField的文件?
from django.db import models
from django.core.files.base import File
import os, os.path
class Project(models.Model):
video = models.FileField(upload_to="media")
def replace_video(self):
"""Convert video to WebM format."""
# This is where the conversion takes place,
# returning a path to the new converted video
# that I wish to override the old one.
video_path = convert_video()
# Replace old video with new one,
# and remove original unconverted video and original copy of new video.
self.video.delete(save=True)
self.video.save(os.path.basename(video_path), File(open(video_path ,"wb")), save=True)
os.remove(video_path)
我希望能够取代文件中的模型对象/实例的FileField 视频。我写的上述方法不起作用。一旦我删除原始文件,我得到以下错误:
ValueError: The 'video' attribute has no file associated with it.
我如何为一个更新替换该文件,并删除原来的(没有更多必要的)?
Side-Note:我找到了related issue,但没有满意的答案。
选项1听起来真的是一个好主意。谢谢! – 2011-01-25 11:21:59