It sounds like what you need to build is a custom ForeignKey type of field that creates another table for that field. Then, you can store an arbitrary number of revisions of that field, along with versioning information, and a wrapper around diff that can perform the functions you mention.
On Aug 16, 5:54 pm, Tim Chase <[EMAIL PROTECTED]> wrote: > > I'm not sure I really understand. It sort of sounds like you are > > talking about a CharField with a choices argument. Is what you're > > looking for more complex? > > No...a "choices" argument assumes you know what you want in the > field beforehand...yes, I'm looking for a headache :) > > > Can you describe it in more detail? > > It would be like a TextField that behaves like the contents of an > RCS ",v" file. As the item is saved, past revisions are > maintained and only deltas are applied. Past revisions can be > extracted. Much like your average wiki edit-field. > > Theoretically, one could bind to an existing library like the > "bzr" revision-control libraries (graciously already written in > Python), mercurial/hg (also written mostly in python), SVN or CVS > (providing python interfaces, but to non-Django-DB backend > storage from my understanding) and hook into their ability to > manage the content as revisions. Even a "rcs.py" or something > like that would be sufficient as long as it could work with a > string-object rather than having to marshall files. > > Such fields would have ways of extracting various revisions and > differences between revisions. > > Sample usage of this imaginary field type (adjust for > apropriateness): > > class Foo(Model): > title = CharField(maxlength=42) > body = RevisionControlField() > > >>> f = Foo.objects.create(title='This is a test', body=""" > ... line 1 > ... Hello world > ... line 3 > ... """) > ... > >>> f.save() > >>> f.body = """ > ... line 1 > ... Goodbye world > ... line 3 > ... """) > >>> f.save() > >>> f.body = """ > ... line 1 > ... Aloha world > ... line 3 > ... """) > >>> f.body.diff() > [output showing "Goodbye" -> "Aloha" in your favorite diff > format, or perhaps a "diff" object] > >>> f.body.diff(1) #diff with > [output showing "Hello" -> "Aloha" in your favorite diff format, > or perhaps a "diff" object] > >>> f.body.revert() # now back at version 2 with "Goodbye" > >>> f.body[1] > """ line 1 > Hello world > line 3 > """ > >>> f.body.revisions > 2 > > Hope this clarifies what I'm hunting for. Thanks though! > > -tim --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
