EF 4.1 父子和继承映射的代码优先问题

Question

我在继承映射方面遇到了一些问题，我无法将其正确映射到基类，并在基类（元素）的所有字段上获得 无效列

在我们从 CTP5 升级到 4.1 以及使用 .IsIndependent() 之前，该项目工作正常

我的代码如下所示：

表结构：

CREATE TABLE [dbo].[elements](
    [elementID] [uniqueidentifier] NOT NULL,
    [elementElementID] [uniqueidentifier] NULL,
    [name] [nvarchar](50) NOT NULL,
    [solutionID] [int] NOT NULL,
    [elementTypeID] [int] NOT NULL,
    [dateCreate] [datetime] NOT NULL,
    [dateChange] [datetime] NOT NULL,
    [placeholderNumber] [int] NULL
)

CREATE TABLE [dbo].[elementRoots](
    [elementID] [uniqueidentifier] NOT NULL,
    [allowsiteCounts] [int] NOT NULL
)


CREATE TABLE [dbo].[elementSites](
    [elementID] [uniqueidentifier] NOT NULL,
    [languageCode] [nvarchar](5) NOT NULL
)


CREATE TABLE [dbo].[elementPages](
    [elementID] [uniqueidentifier] NOT NULL,
    [elementMasterID] [uniqueidentifier] NULL,
    [title] [nvarchar](50) NOT NULL,
    [desciption] [nvarchar](255) NULL,
    [path] [nvarchar](512) NULL,
)

映射；

public DbSet<Element> Elements { get; set; }
public DbSet<ElementRoot> ElementRoots { get; set; }
public DbSet<ElementSite> ElementSites { get; set; }
public DbSet<ElementPage> ElementPages { get; set; }

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{


    modelBuilder.Entity<Element>().HasKey(x => x.elementId);

    modelBuilder.Entity<Element>()
        .HasOptional(s => s.Parent)
        .WithMany(c => c.Children)
        .HasForeignKey(s => s.elementElementId);

        modelBuilder.Entity<Element>().ToTable("elements");

    modelBuilder.Entity<ElementRoot>().Map(m =>
    {

        m.MapInheritedProperties();
        m.ToTable("elementRoots");

    });

    modelBuilder.Entity<ElementSite>().Map(m =>
    {
        m.MapInheritedProperties();
        m.ToTable("elementSites");

    });

    modelBuilder.Entity<ElementPage>().Map(m =>
    {
        m.MapInheritedProperties();
        m.ToTable("elementPages");
    });
}

我收到的错误消息：

Invalid column name 'solutionID'.
Invalid column name 'name'.
Invalid column name 'solutionID'.
Invalid column name 'elementTypeID'.
Invalid column name 'dateCreate'.
Invalid column name 'dateChange'.
Invalid column name 'elementElementId'.
Invalid column name 'placeholderNumber'.
Invalid column name 'solutionID'.
Invalid column name 'name'.
Invalid column name 'solutionID'.
Invalid column name 'elementTypeID'.
Invalid column name 'dateCreate'.
Invalid column name 'dateChange'.
Invalid column name 'elementElementId'.
Invalid column name 'placeholderNumber'.
Invalid column name 'solutionID'.
Invalid column name 'name'.
Invalid column name 'solutionID'.
Invalid column name 'elementTypeID'.
Invalid column name 'dateCreate'.
Invalid column name 'dateChange'.
Invalid column name 'elementElementId'.
Invalid column name 'placeholderNumber'.]
   System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +2030802
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +5009584
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() +234
   System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2275
   System.Data.SqlClient.SqlDataReader.ConsumeMetaData() +33
   System.Data.SqlClient.SqlDataReader.get_MetaData() +86
   System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +311
   System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +987
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +162
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +32
   System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +141
   System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +12
   System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +10
   System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +443

Answer 1

您的映射完全错误。您的数据库对每个实体都有单独的表（包括基本实体类型Elements）。这意味着您必须使用 Table-per-Type (TPT) 映射，但您的代码正在使用 Table-Per-Concrete Type (TPC) 映射。 TPC 要求基本类型的表不存在，而是所有派生实体的表都具有所有基本类型的列。这就是为什么您要处理该异常的原因。从所有子映射中删除 m.MapInheritedProperties();。