Re: Image deduplication and upload_to

[Ricardo Bánffy]

Thanks. I have successfully made a lobotomized version I called
OverwritingStorage that extends FileStorage and overrides
get_available_name, _save and delete (and offers a hashed_path
classmethod to be used in upload_to callables)

http://djangosnippets.org/snippets/2044/

Now my problem is not being able to wrap my head around computing an
ImageField based on another ImageField (in my case, a default
thumbnail that can be edited later)

But that deserves its own thread.

On Thu, May 27, 2010 at 6:37 AM, Nuno Maltez  wrote:
> Hi,
>
> I think it's designed to do that. See the behaviour of the
> save/get_available_name methods on core/files/storage.py (in the
> django source). Maybe you can write your own storage that overrides
> this (never tried it, but should work).
>
> Nuno
>
> 2010/5/26 Ricardo Bánffy :
>> Hi folks.
>>
>> I want to prevent the duplication of uploaded images. For that, I am
>> using the upload_to property of ImageField set to a callable that
>> computes the md5 hash of the uploaded file data and returns a file
>> name. This should work _but_ when I save the model, the filename I
>> gave back in the function is getting a "_1", "_2" and so on suffix to
>> prevent my efforts at deduplication.
>>
>> http://dpaste.com/199576/
>>
>> Anyone has had a similar problem?
>>
>> I understand I'll have to take care of other problems too, like
>> preventing the deletion of files that are referenced by more than one
>> ImageFile and could do something to prevent the actual overwriting of
>> the same data on the same file as before, but that's a start.
>>
>>
>> --
>> Ricardo Bánffy
>> http://www.dieblinkenlights.com
>> http://twitter.com/rbanffy
>>
>> --
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>>
>
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-- 
Ricardo Bánffy
http://www.dieblinkenlights.com
http://twitter.com/rbanffy

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Re: Image deduplication and upload_to

[Nuno Maltez]

Hi,

I think it's designed to do that. See the behaviour of the
save/get_available_name methods on core/files/storage.py (in the
django source). Maybe you can write your own storage that overrides
this (never tried it, but should work).

Nuno

2010/5/26 Ricardo Bánffy :
> Hi folks.
>
> I want to prevent the duplication of uploaded images. For that, I am
> using the upload_to property of ImageField set to a callable that
> computes the md5 hash of the uploaded file data and returns a file
> name. This should work _but_ when I save the model, the filename I
> gave back in the function is getting a "_1", "_2" and so on suffix to
> prevent my efforts at deduplication.
>
> http://dpaste.com/199576/
>
> Anyone has had a similar problem?
>
> I understand I'll have to take care of other problems too, like
> preventing the deletion of files that are referenced by more than one
> ImageFile and could do something to prevent the actual overwriting of
> the same data on the same file as before, but that's a start.
>
>
> --
> Ricardo Bánffy
> http://www.dieblinkenlights.com
> http://twitter.com/rbanffy
>
> --
> You received this message because you are subscribed to the Google Groups 
> "Django users" group.
> To post to this group, send email to django-us...@googlegroups.com.
> To unsubscribe from this group, send email to 
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at 
> http://groups.google.com/group/django-users?hl=en.
>
>

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Image deduplication and upload_to

[Ricardo Bánffy]

Hi folks.

I want to prevent the duplication of uploaded images. For that, I am
using the upload_to property of ImageField set to a callable that
computes the md5 hash of the uploaded file data and returns a file
name. This should work _but_ when I save the model, the filename I
gave back in the function is getting a "_1", "_2" and so on suffix to
prevent my efforts at deduplication.

http://dpaste.com/199576/

Anyone has had a similar problem?

I understand I'll have to take care of other problems too, like
preventing the deletion of files that are referenced by more than one
ImageFile and could do something to prevent the actual overwriting of
the same data on the same file as before, but that's a start.


-- 
Ricardo Bánffy
http://www.dieblinkenlights.com
http://twitter.com/rbanffy

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