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POBusiness Objects - Containers or functional?
 

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    <p>Where I work, we've gone back and forth on this subject a number of times and are looking for a sanity check. Here's the question: Should Business Objects be data containers (more like DTOs) or should they also contain logic that can perform some functionality on that object.</p> <p>Example - Take a customer object, it probably contains some common properties (Name, Id, etc), should that customer object also include functions (Save, Calc, etc.)?</p> <p>One line of reasoning says separate the object from the functionality (single responsibility principal) and put the functionality in a Business Logic layer or object.</p> <p>The other line of reasoning says, no, if I have a customer object I just want to call Customer.Save and be done with it. Why do I need to know about how to save a customer if I'm consuming the object?</p> <p>Our last two projects have had the objects separated from the functionality, but the debate has been raised again on a new project. Which makes more sense?</p> <p><strong>EDIT</strong></p> <p>These results are very similar to our debates. One vote to one side or another completely changes the direction. Does anyone else want to add their 2 cents?</p> <p><strong>EDIT</strong></p> <p>Eventhough the answer sampling is small, it appears that the majority believe that functionality in a business object is acceptable as long as it is simple but persistence is best placed in a separate class/layer. We'll give this a try. Thanks for everyone's input...</p>
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