see dbcook.misc.metadata.diff.py as an attempt to do this over 2 metadata's. svn co https://dbcook.svn.sourceforge.net/svnroot/dbcook/trunk/dbcook/misc/metadata
'''attempt of tree-comparison over metadata. recognised primitives are insert, delete, change of detail. cannot recognise rename/move. links/dependencies are not looked at. ''' dbcook is not needed, except to run the example/test. but in any case, this would not replace u the human-made decisions, version2version. ciao svilen On Tuesday 03 June 2008 00:39:22 Yannick Gingras wrote: > Greetings alchemists, > I'm trying to setup the migration strategy for our project and > I'm looking for some kind of schema differ. > > I took a look at sqlalchemy_migrate: the changeset module provides > interesting functionalities to add columns, alter tables, and > create constraints on an existing database but the versioning parts > seems clumsy and fragile: I have to perform all the schema upgrade > by hand and I have to keep track of the upgrade with some kind of > crude revision control system. There is that and the fact that the > doc is out of date which convince me that I have to find some other > solution. > > All our table definitions are written in Python with the Alchemy > ORM facility; nothing is inferred through autoload. I guess we > could get a rough idea of the changes by walking the list of table > with and comparing the column names in both version. The diff for > a new column would be easy enough to compute and we could trigger > and error if the column is changed so a human could write the > appropriate alter statement. > > I'm sure I'm not the first to look for a solution to schema > upgrade. Is there a package out there to compute the differences > between two versions of a schema? If not, what gotchas should I > know about before I try my hand at such a framework? --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
