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POTable per Concrete Type (TPC) Mapping in EF4.4
 

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  1. POTable per Concrete Type (TPC) Mapping in EF4.4
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    <p>I'm trying to achieve a TPC design on EF 4.4.</p> <p>I have a set of classes that are already mapped to existing tables, and adding a new set with the same structure, that are to be mapped to different tables, with disjoint IDs.</p> <p>So here's pretty much the new design for the old classes (without the new type of hierarchy that I'm going to add).</p> <pre><code>public abstract class HierarchyLevel { public virtual int Id { get; set; } public string Name { get; set; } } public class MainHierarchyLevel : HierarchyLevel { } public abstract class HierarchyItem { public int Id { get; set; } public string Name { get; set; } public string Description { get; set; } public virtual HierarchyLevel Level { get; set; } } public class MainHierarchyItem : HierarchyItem { } public abstract class HierarchyTreeItem { public int Id { get; set; } public virtual HierarchyTreeItem ParentTreeItem { get; set; } public virtual HierarchyItem Parent { get; set; } public virtual HierarchyItem Child { get; set; } } public class MainHierarchyTreeItem : HierarchyTreeItem { } </code></pre> <p>No matter what I do with the configuration, EF always makes a table name up, e.g. I get a query like</p> <pre><code>SELECT [Extent1].[Id] AS [Id], '0X0X' AS [C1], [Extent2].[Name] AS [Name], [Extent2].[Description] AS [Description], [Extent2].[Level_Id] AS [Level_Id] FROM [dbo].[HierarchyItems] AS [Extent1] INNER JOIN [dbo].[HierarchyItems1] AS [Extent2] ON [Extent1].[Id] = [Extent2].[Id] </code></pre> <p>Where HierarchyItems1 is made up by EF.</p> <p>Here's an example of what i'm doing with the configuration:</p> <pre><code>public class HierarchyItemsConfiguration : EntityTypeConfiguration&lt;HierarchyItem&gt; { public HierarchyItemsConfiguration() { Property(hierarchyItem =&gt; hierarchyItem.Id).HasColumnName("Id").IsRequired(); Property(hierarchyItem =&gt; hierarchyItem.Name).HasColumnName("Name").IsRequired(); Property(hierarchyItem =&gt; hierarchyItem.Description).HasColumnName("Description").IsOptional(); } } public class MainHierarchyItemsConfiguration : EntityTypeConfiguration&lt;MainHierarchyItem&gt; { public MainHierarchyItemsConfiguration() { Map(mb =&gt; { mb.MapInheritedProperties(); mb.ToTable("HierarchyItems"); }); ToTable("HierarchyItems"); HasKey(hierarchyItem =&gt; hierarchyItem.Id); HasRequired(hierarchyItem =&gt; hierarchyItem.Level).WithMany().Map(e =&gt; e.MapKey("Level_Id")); } } </code></pre> <p><strong>Any ideas on how to configure this correctly?</strong></p> <p>Thank you!</p>
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