因此,我正在努力实现my previous question的答案。

这是我的模型:

class Talk(models.Model):
  title        = models.CharField(max_length=200)
  mp3          = models.FileField(upload_to = u'talks/', max_length=200)


这是我的表格:

class TalkForm(forms.ModelForm):
  def clean(self):
    super(TalkForm, self).clean()
    cleaned_data = self.cleaned_data

    if u'mp3' in self.files:
      from mutagen.mp3 import MP3
      if hasattr(self.files['mp3'], 'temporary_file_path'):
        audio = MP3(self.files['mp3'].temporary_file_path())
      else:
        # What goes here?
        audio = None # setting to None for now
      ...
    return cleaned_data

  class Meta:
    model = Talk


Mutagen需要磁盘上类似文件的对象或文件名(我认为)-第一种情况(上传的文件大于内存中处理的文件的大小)可以正常工作,但我不知道如何处理否则我会得到。我试过了:

# TypeError (coercing to Unicode: need string or buffer, InMemoryUploadedFile found)
audio = MP3(self.files['mp3'])

# TypeError (coercing to Unicode: need string or buffer, cStringIO.StringO found)
audio = MP3(self.files['mp3'].file)

# Hangs seemingly indefinitely on my test file (~800KB)
audio = MP3(self.files['mp3'].file.read())


诱变剂有问题吗,还是我做错了?

回答后

像这样在我的InMemoryUploadedFile类中即时修改FILE_UPLOAD_HANDLERS设置:

def add_view(self, request, form_url='', extra_context=None):
  request.upload_handlers = [TemporaryFileUploadHandler()]
  return super(TalkAdmin, self).add_view(request, form_url, extra_context)


当我点击Submit时,我得到以下错误500:


处理完上传后,您将无法设置上传处理程序。


即使我尽我所能!

另外,我不确定要返回的对象是否具有ModelAdmin方法(我在savedir(self.files['mp3'].file)中进行了查看)。

最佳答案

您可以尝试以这种方式更改FILE_UPLOAD_HANDLERS,以便Django始终使用temporay文件处理程序:

FILE_UPLOAD_HANDLERS默认值:

("django.core.files.uploadhandler.MemoryFileUploadHandler",
 "django.core.files.uploadhandler.TemporaryFileUploadHandler",)


因此,您可以通过覆盖settings.py中的设置仅保留TemporaryFileUploadHandler

编辑:

简单得多,应该首先想到它:(:

from your.models import Talk
mp3 = self.files['mp3']
f = Talk.mp3.save('somename.mp3', mp3)
MP3(f.mp3.path)
>>> {'TRCK': TRCK(encoding=0, text=[u'5'])}


您可以通过这种方式将InMemoryUploadedFile保存到磁盘,然后使用该文件的路径来使用mutagen

编辑:

没有模型实例也是如此。

import os

from django.core.files.storage import default_storage
from django.core.files.base import ContentFile
from django.conf import settings

from mutagen.mp3 import MP3

mp3 = request.FILES['mp3'] # or self.files['mp3'] in your form

path = default_storage.save('tmp/somename.mp3', ContentFile(mp3.read()))
MP3(os.path.join(settings.MEDIA_ROOT, path))


请注意,它会将文件保存在MEDIA_ROOT中,当我尝试将其保存到其他地方时,我得到SuspiciousOperation,因为您可以写入的位置受到限制...您应该在检查完该文件后删除该文件,我想这是真实的在您的模型上...

path = default_storage.delete('tmp/somename.mp3')

10-06 05:17
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