the API to retrieve history for an individual attribute looks like:
from sqlalchemy.orm import attributes a, u, d = attributes.get_history(Class.attribute, obj) where a, u, d are lists of added items, unchanged items, and deleted items, respectively. For a scalar attributes, a, u, d are lists of length one. Example: user = Session.query(User).get(1) a, u, d = attributes.get_history(User.name, user) a, u, d would be along the lines of: ['jack'], [], ['ed'] to indicate the name field was changed from 'ed' to 'jack'. Adam wrote: > > I have a project where I need to monitor the changes to a record - > when using after_update, is it possible to see what the data was > before the update? > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
