I want to abstract some ugly reporting SQL strings into a read-only object model. I have created an empty class, and then I map it to a select object that pulls some statistical information from the DB. The mapper is complaining that it can't assemble a primary key. I am only using this object as a simplified way of querying the database, and will never want to persist the object. The object is read-only. Is there a way to tell sqlalchemy not to worry about persisting this class?
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