EF does not accept my primary key in its SQL Statement - entity-framework

Question

I have create a table with this schema :
CREATE TABLE [dbo].[A](
[KeyID] [uniqueidentifier] NOT NULL,
[OtherID] [uniqueidentifier] NULL,
[Info] [nvarchar](50) NOT NULL,
CONSTRAINT [PK_TX_A] PRIMARY KEY CLUSTERED
(
[KeyID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
I have created this POCO Class :
public partial class A
{
public A()
{
}
public System.Guid KeyID { get; set; }
public Nullable<System.Guid> OtherID{ get; set; }
public string Info{ get; set; }
}
When I try to insert a new line in my table with Entity Framework :
[TestMethod]
public void TestAdd( )
{
A a = new A( );
Guid myKey = Guid.Parse("9B3CA1AC-279F-48CE-B693-D5329FF3AD14");
a.OtherID = myKey;
a.KeyID = myKey;
a.Info = "Test";
using( var database = new myConnection( ) )
{
database.A.Add( a );
database.SaveChangesAsync( ).Wait( );
}
}
It produces this SQL command :
DECLARE #generated_keys table([A] uniqueidentifier)
INSERT [dbo].[A]([OtherID], [Info])
OUTPUT inserted.[KeyID] INTO #generated_keys
VALUES (#0, #1)
SELECT t.[KeyID]
FROM #generated_keys AS g JOIN [dbo].[A] AS t ON g.[KeyID] = t.[KeyID]
WHERE ##ROWCOUNT > 0
Then it generates this error :
Can not insert the value NULL into column 'KeyID', table 'A. This column does not accept NULL values. INSERT failed.
It seems it doesn't take into account the primary key ID specified and it seems to believe that the primary key is auto incremented.
But this SQL statement works fine in SQL Server :
INSERT INTO A (KeyID, OtheriD, Info)
VALUES('9B3CA1AC-279F-48CE-B693-D5329FF3AD14', '9B3CA1AC-279F-48CE-B693-D5329FF3AD14', 'test')
Do you know what's wrong ?
Thanks for your help.

Answer 1

Your Entity Framework configuration is set up for database-generated primary key columns, that's why you also see in the SQL how EF attempts to retrieve the new KeyID value even though it hasn't set it. Your primary key column isn't database-generated, so this can never work.
If you let EF generate your database for you, you would have got a matching one. If you create your database manually, it has to match what EF thinks it should be, or you get errors like this.
You can chance your model to not treat the key column as database-generated with the DatabaseGenerated attribute, specifying DatabaseGeneratedOption.None.

Answer 2

use this code :
public void TestAdd( )
{
A a = new A( );
Guid myKey = Guid.NewGuid();//use this
a.OtherID = myKey;
a.KeyID = myKey;
a.Info = "Test";
using( var database = new myConnection( ) )
{
database.A.Add( a );
database.SaveChangesAsync( ).Wait( );
}
}