I have a class Property that was testing fine until i added the following to it:&nbsp; <br><br>&nbsp; has_many_polymorphs :labelled, <br>&nbsp;&nbsp;&nbsp; :from =&gt; [:instructional_objects, :lessons, :courses], <br>&nbsp;&nbsp;&nbsp; :through =&gt; :labels,<br>
&nbsp;&nbsp;&nbsp; :dependent =&gt; :destroy<br><br>(in other words, &#39;labels&#39; is a join table through which various objects can be labelled with a property)<br><br>Now my spec file crashes, saying that Property isn&#39;t defined in property.rb:&nbsp; does anyone know what&#39;s gone wrong here?<br>
<br>/home/jars/rails/lesson_planner/branches/max/vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb:249:in `load_missing_constant&#39;: Expected /home/jars/rails/lesson_planner/branches/max/app/models/property.rb to define Property (LoadError)<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; from /home/jars/rails/lesson_planner/branches/max/vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb:452:in `const_missing&#39;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; from /home/jars/rails/lesson_planner/branches/max/vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb:464:in `const_missing&#39;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; from ./spec/models/property_spec.rb:3<br>...<br>