I've been playing around with a Graph database OGM (G is for graph) https://github.com/emehrkay/Gizmo https://github.com/emehrkay/Gizmo and its event sourcing i

I've been playing around with a Graph database OGM (G is for graph) https://github.com/emehrkay/Gizmo https://github.com/emehrkay/Gizmo and its event sourcing is a very simple implementation of what Fowler described in a post a while back. Graphs are simple which made this exercise even easier: entity(vertex) -> edge($RELATIONSHP) -> entity(vertex) vertices are simple, unstructured maps, so in my library you simply add a source entity when saving and all of the changes will be tied to that source. Pseudo: user = get_user('emehrkay') reply = get_reply($THIS_CONTENT) user_reply = connect(user, reply, 'posted') save = save(user_reply, source=user) This would create a graph like this user('emehrkay') -> posted -> reply($THIS_CONTENT) reply($THIS_CONTENT) -> event -> event("reply's changes") event("reply's changes") -> source -> user('emehrkay') "emehrkay made these changes to the reply" Very fun/cool stuff. I haven't had the need to query against the history yet, so I don't know how simple it would be or if it were possible to set a time and query the whole graph against that time (like in the example posted in another comment)