C#, Entity framework, TPH

Question

I have a problem with a TPH mapping. Here are the classes :

Abstract service (base class)

[Table("Services")]
public abstract class AbstractService : IAuditedObject
{
    public int Id { get; set; }

    [DisplayName("Receiver Site")]
    public int? TargetSiteId { get; set; }
    [DisplayName("Receiver Site")]
    public virtual Site TargetSite { get; set; }

    [DisplayName("Start Date")]
    public PartialDate StartDate { get; set; }
    [DisplayName("End Date")]
    public PartialDate EndDate { get; set; }

    [DisplayName("Study")]
    public int? StudyId { get; set; }
    [DisplayName("Study")]
    public virtual Study Study { get; set; }
}

Concrete services

public class AssociatedStaffService : AbstractService
{
    [DisplayName("Person")]
    [Required]
    public int? SourcePersonId { get; set; }
    [DisplayName("Person")]
    public virtual Person SourcePerson { get; set; }

    [DisplayName("Service")]
    [Required]
    public int? RoleId { get; set; }
    [DisplayName("Service")]
    public virtual AssociatedStaffServiceCLI Role { get; set; }

    [DisplayName("Department")]
    public string Department { get; set; }

    public bool IsActive()
    {
        return this.SourcePerson != null && this.TargetSite != null && this.SourcePerson.IsActive() && this.TargetSite.IsActive() && this.Study != null && (this.EndDate == null || this.EndDate.Date == null || this.EndDate.Date > DateTime.Now);
    }
}

public class EthicCommitteeService : AbstractService
{
    [DisplayName("Site")]
    [Required]
    public int? SourceSiteId { get; set; }
    [DisplayName("Site")]
    public virtual Site SourceSite { get; set; }

    [DisplayName("Central")]
    public bool? IsCentral { get; set; }

    public bool IsActive()
    {
        return this.Study != null && this.TargetSite != null && this.SourceSite != null && this.TargetSite.IsActive() && this.SourceSite.IsActive() && (this.EndDate == null || this.EndDate.Date == null || this.EndDate.Date > DateTime.Now);
    }
}

public class ParticipatingService : AbstractService
{
    public const string AUTHORIZATION_DATE = "AuthorizationDate";
    public const string IS_NATIONAL_COORDINATOR = "IsNationalCoordinator";

    [DisplayName("Person")]
    [Required]
    public int? SourcePersonId { get; set; }
    [DisplayName("Person")]
    public virtual Person SourcePerson { get; set; }

    [DisplayName("Service")]
    [Required]
    public int? RoleId { get; set; }
    [DisplayName("Service")]
    public virtual ParticipatingServiceCLI Role { get; set; }

    [DisplayName("Department")]
    public string Department { get; set; }

    public int? RegInvestigatorFormId { get; set; }
    public PartialDate AuthorizationDate { get; set; }
    public bool? IsNationalCoordinator { get; set; }

    public bool IsActive()
    {
        return this.SourcePerson != null && this.TargetSite != null && this.SourcePerson.IsActive() && this.TargetSite.IsActive() && this.Study != null && (this.EndDate == null || this.EndDate.Date == null || this.EndDate.Date > DateTime.Now);
    }
}

public class ExternalService : AbstractService
{
    [DisplayName("Person")]
    [Required]
    public int? SourcePersonId { get; set; }
    [DisplayName("Person")]
    public virtual Person SourcePerson { get; set; }

    [DisplayName("Service")]
    [Required]
    public int RoleId { get; set; }
    [DisplayName("Service")]
    public virtual ExternalServiceCLI Role { get; set; }

    [DisplayName("Department")]
    public string Department { get; set; }

    public bool IsActive()
    {
        return this.SourcePerson != null && this.TargetSite != null && this.SourcePerson.IsActive() && this.TargetSite.IsActive() && this.Study != null && (this.EndDate == null || this.EndDate.Date == null || this.EndDate.Date > DateTime.Now);
    }
}

public class StudyTeamService : AbstractService
{
    [DisplayName("Person")]
    [Required]
    public int? SourcePersonId { get; set; }
    [DisplayName("Person")]
    public virtual Person SourcePerson { get; set; }

    [DisplayName("Service")]
    [Required]
    public int? RoleId { get; set; }
    [DisplayName("Service")]
    public virtual StudyTeamServiceCLI Role { get; set; }

    [DisplayName("Department")]
    public string Department { get; set; }

    public bool IsActive()
    {
        return this.SourcePerson != null && this.TargetSite != null && this.SourcePerson.IsActive() && this.TargetSite.IsActive() && this.Study != null && (this.EndDate == null || this.EndDate.Date == null || this.EndDate.Date > DateTime.Now);
    }
}

I always get the following error :

--- ERROR: One or more validation errors were detected during model generation:

    System.Data.Edm.EdmProperty: Name: Each property name in a type must be unique. Property name 'StartDate' is already defined.
    System.Data.Edm.EdmProperty: Name: Each property name in a type must be unique. Property name 'EndDate' is already defined.  ---

And here is the stack trace :

Unhandled Exception: System.Data.Entity.ModelConfiguration.ModelValidationExcept ion: One or more validation errors were detected during model generation:

    System.Data.Edm.EdmProperty: Name: Each property name in a type must be unique. Property name 'StartDate' is already defined.
    System.Data.Edm.EdmProperty: Name: Each property name in a type must be unique. Property name 'EndDate' is already defined.

at Prisma.Loader.PrismaLoader.Init() in C:\Projects_PrismaLoader\Prisma.Load er\PrismaLoader.cs:line 95 at Prisma.Loader.PrismaLoader.Load(Boolean quick) in C:\Projects_PrismaLoade r\Prisma.Loader\PrismaLoader.cs:line 32 at Prisma.Loader.Program.Main(String[] args) in C:\Projects_PrismaLoader\Pri sma.Loader\Program.cs:line 113

Stack trace is not really useful in this case (it seems...)

Does anyone has an idea where I've made a mistake ? I've been searching for a day now...

Answer 1

Resolved

It seems that the problem was the PartialDate class. It has to be annotated with the [ComplexType] annotation.

Answer 2

I believe you need to make StartDate and EndDate virtual? Edm is trying to override the functionality, but because they are sealed it cannot override them so it is duplicating them in the IL?