Using associations in combination with horizontal inheritance

[Catalin]

Hi Telerik team,

i have a problem modelling a combination of association with horizontal inheritance.

My sample code is this:

public class Parent
{
  public int Id { get; set; }
  public string Title { get; set; }
  public IList<ExecChild> ExecChildren { get; set; }
}

public abstract class ExecChild
{
  public String Title { get; set; }
  public Parent Parent { get; set; }
}

public class Executor : ExecChild
{
  public int Id { get; set; }
  public int Number { get; set; }
}

public class MappingH
{
  public static IEnumerable<MappingConfiguration> Configurations
  {
    get
    {
      var parent = new MappingConfiguration<Parent>();
      parent.HasProperty(p => p.Id).IsIdentity(KeyGenerator.Autoinc);
      parent.HasAssociation(p => p.ExecChildren).WithOpposite(c => c.Parent);
      parent.MapType().ToTable("Parent");
      yield return parent;

      var execChild = new MappingConfiguration<ExecChild>();
      execChild.MapType().Inheritance(InheritanceStrategy.Horizontal);
      yield return execChild;

      var executor = new MappingConfiguration<Executor>();
      executor.HasProperty(d => d.Id).IsIdentity(KeyGenerator.Autoinc);
      executor.MapType(t => new
      {
        Id = t.Id,
        Number = t.Number
      }).ToTable("Executor");
      yield return executor;
    }
  }
}

The code compiles without any problem, but at the run-time at the line creating the DDL script:

script = schemaHandler.CreateUpdateDDLScript(null);

at get this exception:

An unhandled exception of type 'Telerik.OpenAccess.Exceptions.MetadataException' occurred in Telerik.OpenAccess.dll
Additional information: Failed to create main table indexes of class 'ExecChild'.​

 

Can you help me with this problem?

How to map this kind of structure to a DB using horizontal inheritance?

Thanks!

 

 

 

[Catalin]

Not need to replay, I found the answer here:

http://www.telerik.com/support/kb/data-access/details/forward-mapping-models-for-classes-in-an-inheritance-hierarchy

 

[Ady]

Hi Catalin,

 Glad you found the reply.
Do get back in case you need further assistance.

Regards,
Ady
Telerik