EF：使用Fluent映射的TPH实现会引发无效的列名异常

Question

这是我的实施。

 public partial class Person
 {
    #region Constructors

    public Person()
    {            
        PersonExpirableCredentials = new List<personexpirablecredential>();
    }

    #endregion Constructors

    #region Properties

    public int PersonID 
    { 
        get; 
        protected set; 
    }

    public virtual ICollection<personexpirablecredential> PersonExpirableCredentials
    {
        get;
        set;
    }        

    #endregion
}

public abstract class PersonCredential
{
    #region Constructors

    public PersonCredential()
    {
    }

    #endregion

    #region Properties

    public int PersonID 
    { 
        get; 
        protected set; 
    }

    public int PersonCredentialID 
    { 
        get; 
        protected set; 
    }      

    public System.DateTime WhenEffective 
    { 
        get; 
        set; 
    }

    public Nullable<system.datetime> WhenExpire 
    { 
        get; 
        set; 
    }

    public virtual Person Person
    {
        get;
        set;
    }
}

public partial class PersonExpirableCredential : PersonCredential
{
    #region Constructors

    public PersonExpirableCredential() :
        base()
    {
    }

    #endregion

    #region Properties

    public DateTime? WhenCompleted
    {
        get;
        set;
    }

    public string CredentialNumber
    {
        get;
        set;
    }

    #endregion
}

以下是流畅的映射

internal partial class PersonMapping : EntityTypeConfiguration<person>
{
    #region Constructors

    public PersonMapping()
    {
        this.HasKey(t => t.PersonID);       
        this.ToTable("Person");
    }

    #endregion
}

internal partial class PersonCredentialMapping : EntityTypeConfiguration<personcredential>
{
    #region Constructors

    public PersonCredentialMapping()
    {
        this.HasKey(t => new { t.PersonCredentialID }); 
        this.ToTable("PersonCredential");
        this.HasRequired(t => t.Person).WithMany().HasForeignKey(d => d.PersonID);          
    }

    #endregion
}

internal partial class PersonExpirableCredentialMapping :  EntityTypeConfiguration<personexpirablecredential>
{
    #region Constructors

    public PersonExpirableCredentialMapping()
    {
        this.Map(m =>
        {
           m.Requires("CredentialCategoryCode").HasValue("Expirable");
        });
        this.ToTable("PersonCredential");
    }

    #endregion
}

以下是数据库模型：

现在在我的数据访问层中，当我检索此人并尝试访问“Person.PersonExpirableCredentials”时。它使用无效列名“Person_PersonID”抛出错误。下面是SQL查询，它生成。

exec sp_executesql N'SELECT 
[Extent1].[PersonID] AS [PersonID], 
''1X0X'' AS [C1], 
[Extent1].[PersonCredentialID] AS [PersonCredentialID], 
[Extent1].[WhenEffective] AS [WhenEffective], 
[Extent1].[WhenExpire] AS [WhenExpire],  
[Extent1].[WhenCompleted] AS [WhenCompleted], 
[Extent1].[CredentialNumber] AS [CredentialNumber], 
[Extent1].[Person_PersonID] AS [Person_PersonID]
FROM [dbo].[PersonCredential] AS [Extent1]
WHERE ([Extent1].[Person_PersonID] IS NOT NULL) AND ([Extent1].[Person_PersonID] = @EntityKeyValue1) AND ([Extent1].[CredentialCategoryCode] = ''Expirable'')',N'@EntityKeyValue1 int',@EntityKeyValue1=3 

由于某种原因，EF无法识别Person类和子类PersonExpirableCredentials之间的关系。

请帮助。

由于

Answer 1

试试这个

this.HasRequired(t => t.Person).WithMany(p => p.PersonExpirableCredentials).HasForeignKey(d => d.PersonID);          

将您的收藏修改为基本类型

public virtual ICollection<PersonCredential> PersonExpirableCredentials
{
    get;
    set;
} 

Answer 2

您必须将PersonID的getter和setter都设置为public。

public int PersonID 
{ 
    get;
    set;
} 

有几个地方你设置了setter受保护。将这些更改为公开。