Dear All, Send me some study material on DBMS + $100 !
Or if it fits you better, can you please help on the issue described below? The closest situation to what I am facing is described here: http://www.sqlalchemy.org/docs/04/plugins.html#plugins_associationproxy_ building But unfortunately the situation is not close enough to help me. Now, based on the example above, here is the issue: stocks = Table("stocks", meta, Column('symbol', String(10), primary_key=True), Column('description', String(100), nullable=False), Column('last_price', Numeric) ) brokers = Table("brokers", meta, Column('id', Integer,primary_key=True), Column('name', String(100), nullable=False) ) holdings = Table("holdings", meta, Column('broker_id', Integer, ForeignKey('brokers.id'), primary_key=True), Column('symbol', String(10), ForeignKey('stocks.symbol'), primary_key=True), Column('shares', Integer), Column('date', DateTime, primary_key=True) # <-- HERE IS THE DIFFERENCE ) The example in the doc provides a nice way to retrieve one holding: holding = broker.holdings[stock] But what if holdings are parameterized by a new attribute ('date' in our case)? How would you implement a solution allowing you to do something like this: date = datetime.datetime(2007,1,1) holdings = broker.holdingsByDate[date] where 'holdings' is a collection of what the broker is holding at a given date. Thank you for your help, Christophe --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
