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POEF: TPH implementation with Fluent mapping throws Invalid Column Name exception
 

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  1. POEF: TPH implementation with Fluent mapping throws Invalid Column Name exception
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    <p>Here is my implementation.</p> <pre><code> public partial class Person { #region Constructors public Person() { PersonExpirableCredentials = new List&lt;personexpirablecredential&gt;(); } #endregion Constructors #region Properties public int PersonID { get; protected set; } public virtual ICollection&lt;personexpirablecredential&gt; 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&lt;system.datetime&gt; 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 } </code></pre> <p>Below are the fluent mappings </p> <pre><code>internal partial class PersonMapping : EntityTypeConfiguration&lt;person&gt; { #region Constructors public PersonMapping() { this.HasKey(t =&gt; t.PersonID); this.ToTable("Person"); } #endregion } internal partial class PersonCredentialMapping : EntityTypeConfiguration&lt;personcredential&gt; { #region Constructors public PersonCredentialMapping() { this.HasKey(t =&gt; new { t.PersonCredentialID }); this.ToTable("PersonCredential"); this.HasRequired(t =&gt; t.Person).WithMany().HasForeignKey(d =&gt; d.PersonID); } #endregion } internal partial class PersonExpirableCredentialMapping : EntityTypeConfiguration&lt;personexpirablecredential&gt; { #region Constructors public PersonExpirableCredentialMapping() { this.Map(m =&gt; { m.Requires("CredentialCategoryCode").HasValue("Expirable"); }); this.ToTable("PersonCredential"); } #endregion } </code></pre> <p>Here is the database model:</p> <p><img src="https://i.stack.imgur.com/arAWd.jpg" alt="TPH Diagram"></p> <p>Now in my data access layer, when i retrieve the person and try to do access "Person.PersonExpirableCredentials". It throws an error with Invalid Column Name "Person_PersonID". Below is the SQL query, it generates.</p> <pre><code>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 </code></pre> <p>For some reason, EF is not able to identify the relationship between the Person Class and the subclass PersonExpirableCredentials. </p> <p>Help Please.</p> <p>Thanks</p>
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