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I have Django webapp with different content (e.g. Posts, Threads, comments) and I want to keep track of their history. So I'm trying to create a "version-control" for "content". This is how I'm doing it (skip to the end for the question): I have a model Create_Content which represents an action: has an actor ( editor ), a set of modifications ( edition ), a timestamp, and the content it acts on: class Create_Content(models.Model): editor = models.ForeignKey('User') edition = models.TextField() # pickled dictionary date = models.DateTimeField(auto_now_add=True) content = models.ForeignKey('Content') which is saved exactly once because history cannot be changed. I define content has: class Content(models.Model): last_edit = models.ForeignKey(Create_Content, related_name='content_last_id') first_edit = models.ForeignKey(Create_Content, related_name='content_first_id') def author(self): return self.first_edit.editor where last_edit is the last action performed it, and first_edition I use to get the initial author of the content. All the actual content of the webapp is implemented by derived models of Content, which are created/edited by derived models of Create_Content . For instance, class Comment(Content): post = models.ForeignKey(Post, related_name="comment_set") body = models.TextField() is created during the save of Create_Comment(Create_Content) (in fact all subclasses of Create_Content are proxies). For instance, user editions are instances of a subclass of Create_Content (e.g. Edit_Comment(Create_Content) ) which, during save() , makes last_edit to point onto self and updates the actual content (e.g. Edit_Comment.body<

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