title: How can I add an FK constraint to my entity model without adding it to the DB?
body: <p>I have an Entity Framework model with table Employees.  Each employee has a SupervisorId, which points to another record in the same Employees table.  The entity model VS inferred from my DB design looked fine, but I could not update or insert records for the table with the self-reference.  I have taken to using a view of the Employees table for the Supervisors table, but I cannot add an FK constraint to a view in the database.  How can I do this, or achieve the same effect, in the EF designer?</p>
  
  <p>At worst I can skip the FK constrain, but would like to know how to use and populated a standard or custom combobox so the Employee form still offers a choice of Supervisors when editing.</p>