EF 4.1 Code First. Table-per-type inheritance with different primary key name from its base class' primary key name

Question

Given this:

create table Location(
LocationId int identity(1,1) not null primary key,
Address nvarchar(max) not null,
City nvarchar(max) null,
State nvarchar         


        

Answer 1

Here is a workaround for this issue:

Create a view for the derived table and map your entity class that view. Rename the key column in your view so that it matches the key column in the base table.

eg:

base table User (UserID, FirstName, LastName)

derived table Manager (ManagerID, DepartmentID)

Entity Framework fails to update Manager as the key column is different!

solution:

create view UserManager
as
select
ManagerID as UserID,
DepartmentID
from Manager

Then map the Manager class to the UserManager view, instead of to the Manager table.