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POWhy are my Fluent NHibernate SubClass Mappings generating redundant columns?
 

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  1. POWhy are my Fluent NHibernate SubClass Mappings generating redundant columns?
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    <p>I have the following entities</p> <pre><code>public abstract class Card { public virtual int Id { get; set; } public virtual string Name { get; set; } public virtual string Description { get; set; } public virtual Product Product { get; set; } public virtual Sprint Sprint { get; set; } } public class Story:Card { public virtual double Points { get; set; } public virtual int Priority { get; set; } } public class Product { public virtual int Id { get; set; } public virtual string Name { get; set; } public virtual IList&lt;Story&gt; Stories { get; private set; } public Product() { Stories = new List&lt;Story&gt;(); } } </code></pre> <p>And the following mappings</p> <pre><code>public class CardMap:ClassMap&lt;Card&gt; { public CardMap() { Id(c =&gt; c.Id) .Index("Card_Id"); Map(c =&gt; c.Name) .Length(50) .Not.Nullable(); Map(c =&gt; c.Description) .Length(1024) .Not.Nullable(); References(c=&gt;c.Product) .Not.Nullable(); References(c=&gt;c.Sprint) .Nullable(); } } public class StoryMap : SubclassMap&lt;Story&gt; { public StoryMap() { Map(s =&gt; s.Points); Map(s =&gt; s.Priority); } } public class ProductMap:ClassMap&lt;Product&gt; { public ProductMap() { Id(p =&gt; p.Id) .Index("Product_Id"); Map(p =&gt; p.Name) .Length(50) .Not.Nullable(); HasMany(p =&gt; p.Stories) .Inverse(); } </code></pre> <p>When I generate my Schema, the tables are created as follows</p> <pre><code>Card --------- Id Name Description Product_id Sprint_id Story ------------ Card_id Points Priority Product_id Sprint_id </code></pre> <p>What I would have expected would have been to see the columns Product_id and Sprint_id ONLY in the Card table, not the Story table.</p> <p>What am I doing wrong or misunderstanding?</p>
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    1. COThis is indeed odd. I tried duplicating this in fluent 1.1.0.0 and nhibernate 2.1.2.400 on an sqlite database and I do NOT get a `Product_id` or `Sprint_id` column in the story table. If you are not already, have you tried rebuilding the schema from scratch? And what db provider are you using?
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    2. COI am using sqlite also. I downgraded to fluent 1.1.0.685 and NH 2.1.2.4000 and can still recreate the issue. I did set all my projects to compile to x86 (i'm on win7 64, and sql throws a fit otherwise). I will add my schema generation code also.
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    3. COI simplified the code down to the bare minimum, and compiled it against both NH2 and NH3. Same result. I posted the projects here https://bitbucket.org/brookpatten/stackoverflow/src/b267fbc24c5a/why-are-my-fluent-nhibernate-subclass-mappings-generating-redundant-columns/
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