Feeding parsed data to RKMapperOperation throws NSUnknownKeyException

Question

See my other question for background: Will RestKit's dynamic mapping solve this complex JSON mapping?

Due to the way the server structures the json data that I need

Answer 1

The mapper operation does not itself know how to create the instances of the class that you are mapping to. The entity mapping is the correct one to use but you need to teach the mapper operation how to instantiate the Foo objects. To do that you need to create a RKManagedObjectMappingOperationDataSource and set it as the mappingOperationDataSource.