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  1. PO
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    <p>I think you either need to implement the object.Equals() method on the relevant entities, or implement an IEqualityComparer and inject it when you construct the PersistenceSpecification.</p> <p>For example:</p> <pre><code>public class A { private int Id { get; set; } public virtual B B_Member { get; set; } public class Map : ClassMap&lt;A&gt; { public Map() { Id(x =&gt; x.Id); References(x =&gt; x.B_Member); } } } public class B { private int Id { get; set; } public virtual string BString { get; set; } public class Map : ClassMap&lt;B&gt; { public Map() { Id(x =&gt; x.Id); Map(x =&gt; x.BString); } } /// remove this method to have the verification fail public override bool Equals(object obj) { var lhs = obj as B; if (lhs == null) return false; return BString == lhs.BString; } } [Test] public void Verify() { var fcfg = Fluently.Configure() .Database(SQLiteConfiguration.Standard.UsingFile("testdb.sqldb")) .Mappings(mc =&gt; { mc.FluentMappings.Add(typeof (A.Map)); mc.FluentMappings.Add(typeof (B.Map)); }) .ExposeConfiguration(cfg =&gt; new SchemaExport(cfg).Execute(true, true, false)); var sess = fcfg.BuildSessionFactory().OpenSession(); new PersistenceSpecification&lt;A&gt;(sess) .CheckReference(x =&gt; x.B_Member, new B() {BString = "hi"}) .VerifyTheMappings(); Assert.Throws&lt;ApplicationException&gt;( () =&gt; new PersistenceSpecification&lt;A&gt;(sess, new AlwaysFalseEqualityComparer()) .CheckReference(x =&gt; x.B_Member, new B() {BString = "az"}) .VerifyTheMappings()); } </code></pre> <p>Note also that the relevant FNH code for each property comparison is (compliments of reflector):</p> <pre><code> internal virtual void CheckValue(object target) { bool areEqual; object actual = this.property.GetValue(target, null); if (this.entityEqualityComparer != null) { areEqual = this.entityEqualityComparer.Equals(this.propertyValue, actual); } else { areEqual = this.propertyValue.Equals(actual); } if (!areEqual) { throw new ApplicationException(string.Format("Expected '{0}' but got '{1}' for Property '{2}'", this.propertyValue, actual, this.property.Name)); } } </code></pre> <p>Certainly that that exception seems to match the ones you are experiencing.</p>
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    1. POFluent NHibernate PersistenceSpecification Component and Reference Tests
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    1. USfostandy
    1. USfostandy
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    1. POFluent NHibernate PersistenceSpecification Component and Reference Tests
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    1. COI think this does not help, because components are no entities so they have no Ids. I have implemented the object.Equals method, but there is still the same error message for my components and reference. But it would be nice if someone can show me a simple example where one can see that the FNH API works correctly. For me it seems it does not.
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    2. COI'm not sure why components not being entities would mean that implementing equals or an equalitycomparer would not help. I have provided a simple example for a reference.
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