title: does anyone have a working example of a fetched-property in core-data?
body: <p>I have tried to use fetched properties a couple of times, and although it seems to be the right approach, it <em>never</em> works.</p>
  
  <p>In my latest attempt I added the fetched-property to my entity, selected the other entity in the model as the 'destination', and set the predicate to a condition that I know is valid.</p>
  
  <p>Problem 1: When the NSManagedObject-class for the entity is generated it does not include anything for the fetched-property.  After some searching I added the declaration for it in the .h file and the @dynamic statement for it in the .m file (yes, I know it's an NSArray * type).</p>
  
  <p>Problem 2: Even after that, when I access this property in code I get an exception being thrown that states something to the effect that the fetch-request does not have an entity.  I am assuming that the 'entity' would be the one specified as the 'destination' and it is, in fact, there.</p>
  
  <p>So, I'd like someone to provide a concrete working example (iOS platform) where a fetched-property is defined in the model, declared in a NSManagedObject-derived class, and actually used from code.</p>
  
  <p>At this point I am giving up on this time-waster and simply implementing the fetch-request code myself.</p>