title: Entity Framework 5 with custom Models and OData - Web API
body: <p>I'm evaluating some technologies for a new Web Application. Which should use EF5 and Knockout JS with Web API. I wanted to take advantage of the OData feature, when returning IQueryable, but am currently running into the problem, how to convert my EF Models to my Business Models.</p>
  
  <p>As far as I've read, if I want to have a more complex DB (Computed Columns, Stored Procedures, ...) I should use DB First approach. (Correct me if I'm wrong)</p>
  
  <p>Because I need to use DB-First approach and want my models to be Independent of the DB, I need to create them additionally to the EF-Models. And when I return from the DataLayer my Business Model as IQueryable I loose the possibility to execute additional queries directly on the DB but instead they are executed on the ASP.Net server directly.</p>
  
  <p>Of course I don't plan to run complex queries over OData and would anyway implement those as additional actions, but it might be useful on the slower clients (smartphones, ...) to limit the returned data and perform additional filters directly on the server.</p>
  
  <p>Is there any way out of this dilemma, to be still able to use OData?</p>
  
  <p>Regards 
  Peter</p>