batch-relationship.py

class Intent(BizObject):
    name = String()
    
    class BizList(BizList):
        yearly_financials = BatchRelationship(
            conditions=lambda intents: (
                Intent._id,
                YearlyFinancial.intent_id,
                YearlyFinancial.intent_id.including(intents._id)
            ),
            order_by=lambda: YearlyFinancial.year.asc,
            many=True
        )