Hi,
I have model Object and I want to store 0..N files
for each. To keep the files together the files should
be saved under a directory like this: .../objects/ID/
FileField does not support this. Now I found a simple
solution, that I want to share.
The solution is simple: I don't need FileField.
It is redundant to store the file names in the database.
An other point: there is a break in the transaction flow
(filesystem can't rollback like a database).
I just upload to .../objects/ID/ and there is a method
of the model Object which returns the list of all uploaded files. This
just calls os.listdir().
Here is the code, which uses urlquote() to convert the unicode filenames.
# Python
import os
import urllib
# Django
from django.conf import settings
from django.utils.http import urlquote
class Attachment(object):
def __init__(self, obj, filename=None, fs_name=None):
self.obj=obj
if filename:
assert not fs_name
self.filename=filename
else:
assert not filename
self.filename=urllib.unquote(fs_name)
assert self.filename.find("/")==-1, self.filename
def __cmp__(self, other):
assert isinstance(other, Attachment), other
return cmp(self.fs_name, other.fs_name)
def __repr__(self):
return '<%s.%s %s>' % (self.__class__.__module__,
self.__class__.__name__, self.fs_name)
def get_directory(self):
return os.path.join(settings.ATTACHMENT_UPLOAD_TO, str(self.obj.id))
directory=property(get_directory)
def get_fs_name(self):
fs_name=urlquote(self.filename)
return os.path.join(self.directory, fs_name)
fs_name=property(get_fs_name)
def get_absolute_url(self):
return urlquote("%sobject/%d/attachment/%s" % (
settings.SCRIPTNAME, self.obj.id, self.filename))
def delete(self):
os.unlink(self.fs_name)
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