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Asked: 2026-05-11T18:02:46+00:00

Im new to working with Domain Models so forgive me for asking an elementary

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Im new to working with Domain Models so forgive me for asking an elementary question.

If a Domain Object has a 1-many relationship with another Domain Object but logic that uses the first object works with only a subset of that objects related objects, what is the best way to expose this subset?

For example, say a Person is related to many Orders but some external logic needs to examine only the “Dispatched” Orders associated with a Person. Should the Person have a DispatchedOrders property, along with other properties for other subsets (such as CompletedOrders etc) or is this bad design? Assume for performance reasons I cant filter the objects in memory and must use SQL to pull back only the subset I’m interested in.

Thanks

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1 Answer

  1. Editorial Team

    If you’re using SQL to find the set you’re interested in, you’re in a perfect world. Relational queries are all about finding that sort of thing. Find the perfect query, and then just figure out what the class of the result tuples are, i.e., an object for each result tuple, and process them appropriately.

    In your example, you want a set of “Dispatched Orders”, which whatever person information necessary attached to each one.

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