Droppping self foreign key.

[Dmitry]

I have a table with self foreign key.

CREATE TABLE [dbo].[Test](

    [Id] [int] IDENTITY(1,1) NOT NULL,

    [ID_Parent] [int] NULL,

    [Code] [varchar](100) NULL,

 CONSTRAINT [PK_Test] PRIMARY KEY CLUSTERED

(

    [Id] ASC

)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF,
       ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]) ON [PRIMARY]

 

ALTER TABLE [dbo].[Test]  WITH CHECK ADD  CONSTRAINT [FK_Test_Test] FOREIGN KEY([ID_Parent])

REFERENCES [dbo].[Test] ([Id])

ALTER TABLE [dbo].[Test] CHECK CONSTRAINT [FK_Test_Test]

For mapping I'm using Artificial:

MappingConfiguration configuration = new MappingConfiguration("Test", "ConsoleApp");
configuration.MapType().WithConcurencyControl(OptimisticConcurrencyControlStrategy.Changed).ToTable("Test");
var prop = configuration.HasArtificialAssociation("ID_Parent_fk", configuration.ConfiguredType);
prop.WithOppositeCollection("Tests");

prop.ToColumn("ID_Parent");

prop.HasConstraint();

But handler.CreateUpdateDDLScript generate script for deleting constraint.

var handler = GetSchemaHandler();

//script = 'ALTER TABLE [Test] DROP CONSTRAINT [FK_Test_Test]'
var script = handler.CreateUpdateDDLScript(new SchemaUpdateProperties());


if (!String.IsNullOrEmpty(script))

    handler.ForceExecuteDDLScript(script);

How map self foreign key right using artificial mapping?
Thanks.

[Damyan Bogoev]

Hi Dmitry,

 
I am afraid this is an expected behaviour - dropping existing self-reference constraints.

Actually you could disable generating any migration script related to constraints by setting the SchemaUpdateProperties CheckConstraint setting to false.

Hope that helps.

Regards,
Damyan Bogoev
Telerik