Question

Should I access global db object directly from within the methods of each class? Or from each method, should I instantiate an instance of the db object?

One of my database objects changes depending on the id of the info being accessed so it is created through a function connectToDatabase(id). Should I make this a global function, have it return a database object and instantiate it from each method, or something else?

Thanks.

Answer 1

SQLAlchemy suggests that a function which creates the session be global.

http://www.sqlalchemy.org/docs/reference/orm/sessions.html#sqlalchemy.orm.sessionmaker

It is intended that the sessionmaker()
function be called within the global
scope of an application, and the
returned class be made available to
the rest of the application as the
single class used to instantiate
sessions.