Hi everyone, I have a product table which has a product_id field as the primary key. I'd like to have the value of this field be generated from two sequences with different number range depending on the content of the product_type field. E.g., when product_type == 1, product_id will be generated between 1000 and 8999, and when product_type == 2, product_id will be generated between 9000 and 9999.
In the database, I can simply define a before insert trigger, and get the next value from the 2 sequences depending on the value of product_type, since the trigger function has access to the whole record to be inserted. In SQLAlchemy however, I can find a way to define such a table. Because product_id is the primary key column, I can't use a database trigger with PassiveDefault since it will be pre-executed anyway. It seems that I shall use a pre-executed default function to fetch the appropriate sequence value, but I couldn't find a way to access the product_type field from within the default function. How do I access other table columns from the default function? If it is not possible, is there a work around for my situation? Best Regards Hong Yuan --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
