python - AttributeError : 'file' object has no attribute '_committed' . 重命名图像 django 模型

Question

我正在使用 requests 通过链接下载图像并将它们保存到模型中

f = open('00000001.jpg','wb')
f.write(requests.get('http://www.gunnerkrigg.com//comics/00000001.jpg').content)
event.image = f
f.close()

event.save() 发生错误:

    Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Users/TheKotik/tick-tock2/denv/lib/python2.7/site-packages/django/db/models/base.py", line 734, in save
    force_update=force_update, update_fields=update_fields)
  File "/Users/TheKotik/tick-tock2/denv/lib/python2.7/site-packages/django/db/models/base.py", line 762, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File "/Users/TheKotik/tick-tock2/denv/lib/python2.7/site-packages/django/db/models/base.py", line 824, in _save_table
    for f in non_pks]
  File "/Users/TheKotik/tick-tock2/denv/lib/python2.7/site-packages/django/db/models/fields/files.py", line 312, in pre_save
    if file and not file._committed:
AttributeError: 'file' object has no attribute '_committed'

Google 了一会儿，了解到用 id 命名图像的方法可能有问题，但无法真正理解到底出了什么问题以及为什么

def get_image_path(instance, filename):
    return 'event_img/{0}'.format(instance.event.id)

class Event(models.Model):
    image = models.ImageField(upload_to=get_image_path)

Answer 1

你应该看看FieldFile.save()但基本上您可以执行以下操作:

from django.core.files import File
...
event.image.save(f.name, File(f))