Would it be reasonable to have a backend-specific hook to determine a fingerprint, where that could be mtime or md5 or whathaveyou as long as equality (or maybe ordering) works?
On Oct 8, 2012, at 10:23 AM, Alex Ogier <alex.og...@gmail.com> wrote: > On Mon, Oct 8, 2012 at 1:06 PM, ptone <pres...@ptone.com> wrote: > While git may be common, and your problem not unique - this is still a > condition of your dev environment rendering modification dates invalid. There > might be other situations where this is the case (I've run into scripts that > muck with modification dates based on camera/jpeg metadata). > > So after some further discussion on IRC - it was determined that md5, while > somewhat common, was far from a standard, and was likely not to be available > as remote call for network based storage backends. And so the final > resolution is to wontfix the ticket. > > In the end - this lack of a universal fingerprint is just a limitation of our > storage tools. > > -Preston > > Is there a reason this fingerprint must be universal? If you're dealing with > a backend like S3, where network latency and expensive writes are a problem, > but md5 is a builtin remote call (available on any GET), why not just do an > md5 sum in the _save() method? Basically, just buffer the File object you > receive, take an md5 in python, and then make a decision whether to upload or > not. In the common case of reading from local disk and writing to S3, this is > a big win, and doesn't require cooperation from any other backends, or > standardizing on md5 as a fingerprint method. > > Best, > Alex Ogier > -- > You received this message because you are subscribed to the Google Groups > "Django developers" group. > To post to this group, send email to django-developers@googlegroups.com. > To unsubscribe from this group, send email to > django-developers+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/django-developers?hl=en. -- You received this message because you are subscribed to the Google Groups "Django developers" group. To post to this group, send email to django-developers@googlegroups.com. To unsubscribe from this group, send email to django-developers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-developers?hl=en.
