title: VS 2013 Lightswitch new record creation with identity field
body: <p>I have a very basic testbed Lightswitch 2013 application, using an OData data source via Web API 2 and beyond that Entity Framework 6. The table in question has an auto-incrementing id field which is the primary key. </p>
  
  <p>All is good in the sense that I can view data and update existing entries via the Lightswitch HTML Client. I can't create a new entry though, and I'm not sure how to handle this 'id' field. Basically as I understand it, it must be there in the Lightswitch table because it's obviously needed to update existing entries. For new entries I don't want to supply it because the database backend will just pick the next number. I have verified via Fiddler that I can create a new entry via OData and a POST without supplying a value for 'id', so how do I make Lightswitch ignore it ?</p>