Question

我有以下型号：

            Public MustInherit Class Epreuve

            Public Enum EpreuveType
                CourseStade = 1
                ConcoursSansBarre = 2
                ConcoursAvecBarre = 3
                EpreuveMultiple = 4
                EpreuveCombinee = 5
            End Enum

            Public Property EpGuid As Guid

            Public Property FormatPerf As String

            Public Property CodeAppel As String

            Public Property Nom As String

            Public Property NomReduit As String

            Public Property Chrono As String

            Public Property Vent As Boolean

            Public Property Ajustement As Double

            Public MustOverride ReadOnly Property TypeEpreuve As EpreuveType

        End Class

    Public MustInherit Class EpreuveStade
        Inherits Epreuve
    End Class

Public MustInherit Class EpreuveComposee
    Inherits EpreuveStade
    Implements ISousEpreuve

    Public Property EpParentGuid As Guid Implements ISousEpreuve.EpParentGuid

    Public Property SousEpreuves As ObservableCollection(Of EpreuveStade) Implements ISousEpreuve.SousEpreuves

End Class

Public Class EpreuveCombinee
    Inherits EpreuveComposee

    Public Property EpreuveParent As EpreuveComposee

    Public Overrides ReadOnly Property TypeEpreuve As EpreuveType
        Get
            Return EpreuveType.EpreuveCombinee
        End Get
    End Property
End Class

EpreuveComposee和EpreuveStade有许多可能的关系。以下是我已经完成的流畅API：

With modelBuilder.Entity(Of Epreuve)
    .HasKey(Function(ep) ep.EpGuid)
    .Property(Function(ep) ep.EpGuid).HasDatabaseGeneratedOption(ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity)
    .Map(Of EpreuveCombinee)(Function(f) f.Requires("TypeEpreuve").HasValue(DirectCast(Epreuve.EpreuveType.EpreuveCombinee, Integer)))
End With

With modelBuilder.Entity(Of EpreuveCombinee)
    .HasRequired(Function(f) f.EpreuveParent).WithMany.HasForeignKey(Function(f) f.EpParentGuid)
End With

当我尝试添加迁移时，出现以下错误：

外键组件＆＃39; EpParentGuid＆＃39;不是声明的财产键入＆＃39; EpreuveCombinee＆＃39;。验证它是否未明确从模型中排除，并且它是一个有效的原始属性。

Answer 1

我找到了它。

Public MustInherit Class EpreuveComposee
    Inherits EpreuveStade
    Implements ISousEpreuve

    Public Property EpParentGuid As Guid Implements ISousEpreuve.EpParentGuid

    Public Property EpParent As Epreuve Implements ISousEpreuve.EpParent

    Public Property SousEpreuves As ObservableCollection(Of Epreuve) Implements ISousEpreuve.SousEpreuves

End Class

Public Class EpreuveCombinee
    Inherits EpreuveComposee
End Class

流畅的API：

With modelBuilder.Entity(Of EpreuveComposee)
    .HasMany(Function(f) f.SousEpreuves).WithMany().Map(Sub(m)
                                                            m.ToTable("EpreuveSousEpreuves")
                                                            m.MapLeftKey("EpGuid")
                                                            m.MapRightKey("EpParentGuid")
                                                        End Sub)
End With

外键组件＆＃39;。＆＃39;不是类型＆＃39;的声明属性。＆＃39;

1 个答案: