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当我在本地提供媒体服务并且需要处理获取文件内容的任务时,这非常简单。但是,我只是转移到了 django-storages,这并不是替代品。有人可以为我提供一种将文档从 S3 中提取出来的方法,以便我可以处理它。

老办法:

filename = settings.MEDIA_ROOT + "/" + document.name
xlsx = XLSXParser(filename = filename, uniq_header_column='XYX')

但是我转移到 django-storages 并且这(显然)不起作用。如何从 s3 中提取文件的本地副本来处理它。我以为我可以简单地这样做:

新(失败)方式:

filename = settings.MEDIA_ROOT + "/" + document.name

if not os.path.isfile(filename):
    new_filename = tempfile.NamedTemporaryFile(delete=False)
    new_filename.write(document.read())
    filename = new_filename

xlsx = XLSXParser(filename = filename, uniq_header_column='XYX')

但是我不能在它爆炸时对此进行 read() 。

Traceback (most recent call last):
  File ".../celery/task/trace.py", line 212, in trace_task
    R = retval = fun(*args, **kwargs)
  File ".../tasks.py", line 63, in process_homes
    process_homes_non_task(**kwargs)
  File ".../tasks.py", line 33, in process_homes_non_task
    new_filename.write(document.read())
  File ".../django/core/files/utils.py", line 16, in <lambda>
    read = property(lambda self: self.file.read)
  File ".../django/db/models/fields/files.py", line 46, in _get_file
    self._file = self.storage.open(self.name, 'rb')
AttributeError: 'FieldFile' object has no attribute 'storage'

最后,我需要它同时适用于旧方式和新方式。显然我有点想多了..

更新:

遵循文档也无济于事。

filename = settings.MEDIA_ROOT + "/" + document.name
if not os.path.isfile(filename):
    from django.core.files.storage import default_storage
    s3_file = default_storage.open(document.name, 'rb')
    new_filename = tempfile.NamedTemporaryFile(delete=False)
    new_filename.write(s3_file.read())
    filename = new_filename

xlsx = XLSXParser(filename = filename, uniq_header_column='Lot_Number')
xlsx.load_workbook_and_sheet()

谢谢您的帮助。

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