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PONHibernate ComponentAsId() does not actually set Id property
 

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  1. PONHibernate ComponentAsId() does not actually set Id property
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    <p>I am trying to set up NHibernate (3.2.0.4000) using the coded mapping but I can't get the ComponentAsId working properly.</p> <p>I have a database schema that I can't change where the primary key consists of a string and a date so I need to use a component as the Id:</p> <p>i.e.</p> <h2>Database schema</h2> <pre><code>Id varchar(20) NOT NULL, EffectiveDate datetime NOT NULL, Property1 int </code></pre> <h2>Classes</h2> <pre><code>public class EffectiveDateId { public string Id { get; set; } public DateTimeOffset EffectiveDate { get; set; } } public class MyClass { public EffectiveDateId Identity { get; set; } public int Property1 { get; set; } } </code></pre> <h2>Mapping</h2> <pre><code>var mapper = new ConventionModelMapper(); mapper.Class&lt;MyClass&gt;(map =&gt; map.ComponentAsId(id =&gt; id.Identity, cid =&gt; { cid.Property(x =&gt; x.Id, x =&gt; x.Length(20)); cid.Property(x =&gt; x.EffectiveDate); })); </code></pre> <p>But this does not work as the Identity propery on MyClass is null.</p> <p>The mapping as XML looks like this:</p> <pre><code>&lt;hibernate-mapping xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:nhibernate-mapping-2.2"&gt; &lt;class name="Test.MyClass, Test, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"&gt; &lt;composite-id class="EffectiveDateId, Test, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"&gt; &lt;key-property name="Id" type="AnsiString" length="20" /&gt; &lt;key-property name="EffectiveDate" /&gt; &lt;/composite-id&gt; &lt;property name="Property1" /&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>However if I manually change the XML to include <strong>name="Identity"</strong> like this:</p> <pre><code>&lt;hibernate-mapping xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:nhibernate-mapping-2.2"&gt; &lt;class name="Test.MyClass, Test, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"&gt; &lt;composite-id name="Identity" class="EffectiveDateId, Test, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"&gt; &lt;key-property name="Id" type="AnsiString" length="20" /&gt; &lt;key-property name="EffectiveDate" /&gt; &lt;/composite-id&gt; &lt;property name="Property1" /&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>it works.</p> <p>I've tried setting the id by adding (in addition to the ComponentAsId mapping)</p> <pre><code>mapper.Class&lt;MyClass&gt;(map =&gt; map.Id(id =&gt; id.Identity)); </code></pre> <p>but that just generates an NHibernate.MappingException</p> <blockquote> <p>Ambiguous mapping of Test.MyClass id. An id property, with generator, was defined and you are trying to map the component Test.EffectiveDateId, of property 'Identity', as id for Test.MyClass.</p> </blockquote> <p>Using the debugger I can see that for the code mapped configuration, the ClassMapping.IdentifierProperty is null while in the XML confguration it is set to a NHibernate.Mapping.Property instance.</p> <p>So, is there a bug in the implementation of ComponentAsId() that is not setting the IdentifierProperty or am I doing it wrong?</p> <p>regards, Eamon</p>
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    1. USEamon
    1. USEamon
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    1. COIt does look like a bug to me. https://nhibernate.jira.com
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      1. PONHibernate ComponentAsId() does not actually set Id property
      1. USDiego Mijelshon
    2. COI'm pretty sure it's a bug too so I've logged a [bug](https://nhibernate.jira.com/browse/NH-2989)
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      1. USEamon
    3. COThis has been fixed now in the master branch of the source code.
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      1. USEamon
 

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