StackOverflow2013

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POSeparation of Concerns the Repository Pattern & Entity Framework 3.5
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copied!<p>I'm trying to be a better developer...</p> <p>What I'm working with:</p> <ol> <li>.Net MVC Framework 1.0</li> <li>Entity Framework 3.5</li> </ol> <p>I've been doing some reading and I think what i want to do is:</p> <ol> <li>Create a repository for each aggregate in the domain. An Order repository for example will manage an Order's OrderItems.</li> <li>Create a service layer to handle business logic. Each repository will have a corresponding service object with similar methods.</li> <li>Create DTOs to past between the repository and service</li> <li>Possibly create ViewModels which are classes for the View to consume.</li> </ol> <p>I have a base repository interface which my aggregate repository interfaces will implement...</p> <pre><code>public interface IRepository<T> { IEnumerable<T> ListAll(); T GetById(int id); bool Add(T entity); bool Remove(T entity); } </code></pre> <p>My Order Repository interface is defined as follows...there will likely be additional methods as I get more into this learning exercise.</p> <pre><code>public interface IOrderRepository : IRepository<Order> { } </code></pre> <p>My service classes are essentially defined the same as the repositories except that each service implementation includes the business logic. The services will take a repository interface in the constructor (I'm not ready for IoC in this exercise but believe that is where I'd like to end up down the road).</p> <ol> <li>The repository implementations will push and pull from the database using Entity Framework. When retrieving data; the methods will only return the DTOs and not the EF generated objects</li> <li>The services (as I'm calling them) will control the repository and perform the business logic. The services are what you will see in the controller i.e. _orderService.GetById(1).</li> <li>This is where I started flip flopping and could use some feedback...should I maybe have my service classes populate ViewModel classes...should I not have ViewModel classes....maybe that is too much mapping from one type to another?</li> </ol> <p>I would love to get some feedback on the direction I am heading with regards to a separation of concerns.</p> <p>Thanks</p>

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