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POHow to separate large table into multiple discrete types using EF-Code-First
 

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    <p>I am trying to separate a large table into multiple discrete types.</p> <p>I'm following the example here: <a href="http://weblogs.asp.net/manavi/archive/2011/04/24/associations-in-ef-4-1-code-first-part-4-table-splitting.aspx?CommentPosted=true#commentmessage" rel="nofollow">http://weblogs.asp.net/manavi/archive/2011/04/24/associations-in-ef-4-1-code-first-part-4-table-splitting.aspx?CommentPosted=true#commentmessage</a></p> <p>It's working for a primary type and a sub-type, but does not work when I employ multiple types. I received an error </p> <blockquote> <p><em>The Entity types 'CampaginFeedback' and 'CampaignSurvey' cannot share table 'Campaign' because they are not int he same type hierarchy or do not have a valid one to one foreign key relationship with matching primary keys between them.</em></p> </blockquote> <p>Here are simplified versions of my classes:</p> <pre class="lang-cs prettyprint-override"><code>public class Campaign { [Key] public int CampaignId {get;set;} public string Name {get;set;} public virtual CampaignSurvey Survey {get;set;} public virtual CampaignFeedback Feedback {get;set;} } public class CampaignSurvey { [Key] public int CampaignId {get;set;} public string Question {get;set;} public string Answer {get;set;} } public class CampaignFeedback { [Key] public int CampaignId {get;set;} public string Feedback {get;set;} } protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Conventions.Remove&lt;PluralizingTableNameConvention&gt;(); modelBuilder.Entity&lt;Campaign&gt;().HasRequired(c =&gt; c.Survey).WithRequiredPrincipal(); modelBuilder.Entity&lt;Campaign&gt;().HasRequired(c =&gt; c.Feedback).WithRequiredPrincipal(); modelBuilder.Entity&lt;Campaign&gt;().ToTable("Campaign"); modelBuilder.Entity&lt;CampaignSurvey&gt;().ToTable("Campaign"); modelBuilder.Entity&lt;CampaignFeedback&gt;().ToTable("Campaign"); } </code></pre>
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