This can happen when using keyPaths to traverse an object graph and is hard to anticipate when
defining mappings. RestKit will now perform a sanity check before recursively performing
relationship object mapping operation and will log a warning if the relationship targets
a collection containing another collection. At the debug logging level, RestKit will log
The fix for such scenarios is to use KVC collection operators (such as @unionOfObjects,
@unionOfArrays, etc.) to flatten the collection out into a collection of dictionaries.
NSDateFormatters, added a preferredDateFormatter for use when serializing dates to strings,
replaced the use of the description method for date encoding to strings with invocation of the
preferredDateFormatter, added new attribute transformation strategy from NSDate -> NSString properties
(also using the preferred date formatter), and provided customization support for date handling globally
and on a per-mapping basis. closes#200, closes#313, closes#309, closes#308
Other changes include:
* Eliminated the RKObjectFactory protocol and implementations. Object mapping instances themselves are
now responsible for instantiating target objects for mapping.
* Introduced RKObjectAbstractMapping superclass for RKObjectMapping and RKObjectPolymorphicMapping.
* Updated example applications to use block object loaders (RKTwitter and RKTwitterCoreData)
* Refactored method signatures of RKObjectMapper, RKObjectMapping, and RKObjectMappingProvider to reflect the
existence of abstract mapping types. This was necessary to make polymorphic mappings integrate cleanly.
* Fixed overlap in RestKit error domains between network and object mapping. fixes#208
* Removed RestKit from inheritance hierarchy
* Mappings are implemented as concrete classes
* Mapper is much more flexible & powerful
* Much more robust error handling
* Serialization is reimplemented as an object mapping operation
* Added ability to serialize to JSON natively
* Reworked Core Data integration
* Simplified the codebase substantially
