StackOverflow2013

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2012-03-17T13:59:10.070
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2013-01-30T23:19:12.033
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2013-01-30T23:19:12.033
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MVC and 3-tier are completely different things. I see a lot of people confuse the two because both got 3 parts. MVC is a UI pattern: View: contains html and js only (in case of a web project) Controller: is a kind of a mediator between the UI (= the view) and the back-end (= the model) Model: this is where your domain objects live, as well as the business and data-access logic 3-tier concerns the whole of you application: UI: contains the html/js as well as the code behind of the pages. There is absolutely no logic here, other than UI code and calling the business layer. Business layer: this is where you put things like calculations, conditions, validation, .. So the actual behaviour of your application. There is no data access code here. Data access: here where you talk to the database and return the data to the business layer. Nothing else, the business layer should know what to do with it. So if you combine the two, you'll get: UI: views and controllers Business layer: part of the model Data access: part of the model Domain object: you'll want to put the objects you're working with (product, order, ..) in a separate layer. This is also a part of the model. Shoot if you got questions!
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1. PODifference between MVC controller and business logic (3 tier)
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