EF Core FromSQLRaw and Stored Procedures to insert data

Question

I have a Entity Framework Core application. I have a stored procedure which I use to insert data. The stored procedure is used elsewhere so I cannot change it.

When I call it to create an entry, it does not work because the Description column is not returned from the stored procedure. So I get an error when I call FromSQLRaw unless I set Description as [NotMapped] .

However, I don't want to use [NotMapped] because I might do something like

dm.Offices.Where(o => o.Id > 10)

and surely [NotMapped] will not return unmapped columns. So what can I do?

using (var dm = new DatabaseModel())
{
    Office london = new Office { Description = "london" };
    var item = dm.Offices.FromSqlRaw("EXECUTE sp_addoffice {0}", london.Description);
}

public partial class Office
{
    [Key, Column("OfficeID")]
    public int ID { get; set; }
    public string Description { get; set; }
}

public partial class DatabaseModel : DbContext
{
    public virtual DbSet<Office> Offices { get; set; }
}

CREATE TABLE [dbo].[Offices]
(
    [OfficeID] [int] IDENTITY(1,1) NOT NULL primary key,
    [Description] [varchar](50) NULL
)

CREATE PROCEDURE [dbo].[sp_addoffice]
    @Description varchar(50)
AS
BEGIN
    SET NOCOUNT ON;

    INSERT INTO offices (Description) 
    VALUES (@Description)

    SELECT SCOPE_IDENTITY() AS OfficeID
END

Answer 1

Create new class

public class OfficeId
{
public int Id {get; set;}
}

Add this class to you EF context:

public virtual DbSet<OfficeId> OfficeIds { get; set; }

   modelBuilder.Entity<OfficeId>(e =>
            {
                e.HasNoKey();
            });

After this use just this:

 var officeId = dm.OfficeIds.FromSqlRaw("EXECUTE sp_addoffice {0}", london.Description);

After this you can use this you can validate an officeId.Id and use any way you are needed.

Answer 2

You could change the SQL to something that returns the proper shape after running the stored procedure. EG:

set nocount on;
declare @ids table(id int);

insert into @ids(id)
execute sp_addoffice {0};

select *
from offices 
where id = ( select top 1 id from @ids );