Hello Michael, > what I see immediately is that you're declaring mutliple > declarative_bases and multiple MetaData objects. All of the Table > objects which relate to one another need to share the same underlying > MetaData object, and the declarative_base() function also uses a > MetaData object which it creates for you, unless one is passed. > > So you need a "global" module everyone works from which starts with > something like: > > meta = MetaData() > Base = declarative_base(metadata=meta) > > then every Table uses the above "meta" as its "metadata" argument, > every declared mapped class inherits from Base.
Thank you kindly for this concept, I really appreciate your advice thus far. I'm still struggling with this same challenge though, I've got a horrible dose of n00bitus I'm afraid. Above you talk about a global module in the application which creates the Base and metadata, but I don't understand how these can then be accessed by other classes around the application? Do you have any good sample code or a link to a decent tutorial? Seems all I can find are examples which are based on the idea that all the classes are defined in the same module, which isn't practical. I really appreciate the help Michael, thanks. Heston --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
