title: NHibernate fluent Prevent children being updated
body: <p>The application I have uses localization. The way it is built, is that it examines an entity (traversing down the structure) and translates every property marked as 'translate'.</p>
  
  <p>The translations are stored in separate translation tables.</p>
  
  <p>This is all fine but it leaves me with the problem that I now get the translated values in my 'default' values when I update the entity using the translations. And I don't want that.</p>
  
  <p>Let me try and explain better.</p>
  
  <p>Database:<img src="https://i.stack.imgur.com/6UfuX.jpg" alt="enter image description here"></p>
  
  <p>The mapping of footprintlinevLue:</p>
  
  <pre><code>public class FootprintLineValueMap : ClassMap&lt;FootprintLineValue&gt; {
   public FootprintLineValueMap() {
      Table("FootprintLineValue");
  
      Id(x =&gt; x.Id).GeneratedBy.Identity().Column("Id");
      References(x =&gt; x.FootprintLine).Column("FootprintLineId");
      References(x =&gt; x.CategoryValue).Column("CategoryValueId").Cascade.None();
  
    }
  </code></pre>
  
  <p>As you can see a footprintline has multiple values that reference a categoryValue. The categoryvalue is localized.</p>
  
  <p>When I now retrieve footprintlines our framework will put it through our translationservice and will automatically translate the Name and Description of the CategoryValue in the corresponding culture. If it cant find a translation in CategoryValueLocal, it will use the default in CategoryValue.</p>
  
  <p>However...if I save a Footprintline, it will save the translated values back into CategoryValue (overwriting the default) instead of ignore it.</p>
  
  <p>CategoryValues are not value objects and could be changed so I cant make them readonly.
  I tried to map the reference as Cascade.None, but that doesn't seem to do anything.</p>
  
  <p>I hope there is a way to simply mark this in the mapping so we can keep on using our TranslationService instead of having to figure out another way to hande localization.</p>