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PONo persister for... {SUBCLASS} NHibernate with Fluent NHibernate
 

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  1. PONo persister for... {SUBCLASS} NHibernate with Fluent NHibernate
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    <p>How do I let NHibernate ignore extra properties of a subclass of my model?</p> <pre><code>class SuperModel { // hot I know { public Guid Id { get; private set; } public string FirstName { get; set; } } class SubModel : SuperModel { public string FavoriteColor { get; set; } } </code></pre> <p>I really only want to store the <code>SuperModel</code> data using my repository and use the <code>FavoriteColor</code> elsewhere, but I get </p> <pre><code>No persister for: SubModel </code></pre> <p>even though I save it with my repository as</p> <pre><code>void Store(SuperModel model) { using (var session = Session){ session.SaveOrUpdate(model); // &lt;&lt;&lt;&lt; The exception is thrown here } } </code></pre> <p>and some where else I use</p> <pre><code>void WhatToDo(SubModel model) { doSomething(model.FavoriteColor); } </code></pre> <p>And I use it as such</p> <pre><code>var model = new SubModel { FirstName = "Miranda", FavoriteColor = "Green" }; modelRepository.Store(model); someService.WhatToDo(model); </code></pre> <p>Any one know how I can fluently configure this? Thanks.</p> <p>FYI- implicit and explicit casting has no effect.</p> <p><strong>Edit</strong></p> <p>My mappings are like this</p> <pre><code>class SuperModelMap : ClassMap&lt;SuperModel&gt; { public SuperModelMap() { WithTable("SuperModels"); Id(x =&gt; x.Id); Map(x =&gt; x.FirstName); } } </code></pre> <p><strong>Edit 2</strong></p> <p>I figure/found out that I could do this, but in my database, I have to have a dummy table, which would just be inefficient. It works but there has to be a better way...</p> <p>In my SuperModelMap...</p> <pre><code>JoinedSubClass&lt;SubModel&gt;("SubModel", MapSubModel); private void MapSubModel(JoinedSubClassPart&lt;SubModel&gt; part) { // Leave this empty } </code></pre> <p><strong>Edit 3</strong> I'm closer, but I still get a different error on selection.</p> <p>I tried this.</p> <pre><code>DiscriminateSubClassesOnColumn("Id") .SubClass&lt;SubModel&gt;(m =&gt; { }); </code></pre> <blockquote> <p>InnerException {"Object with id: 5586b075-47f1-49c8-871c-9c4d013f7220 was not of the specified subclass: SuperUser (Discriminator was: '1000')"} System.Exception {NHibernate.WrongClassException}</p> </blockquote>
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    1. USDaniel A. White
    1. USDaniel A. White
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      1. USThomas G. Mayfield
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    1. COCan you show us your mappings perhaps?
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      1. USJames Gregory
    2. COTrying to solve my problem I happened upon this. yeah after the comment of "hot I know" for the entire rest of the page I just read the code as a story and couldn't stop laughing. Good solid test case for learning :)
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      1. USpercent20
    3. CO@percent20 - vote it up then!
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      1. USDaniel A. White
 

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