Refactored the Rails router to respect properties specified by the model objects. Introduced new support to allow models to modify RESTful object loaders just before they are sent. Sample app completely works. Really fucking happy with how this is turning out!

Code/ObjectMapping/RKObjectMappable.h

@@ -8,6 +8,7 @@
  */
 
 @protocol RKRequestSerializable;
+@class RKObjectLoader;
 
 /**
  * Must be implemented by all classes utilizing the RKModelMapper to map REST
@@ -40,17 +41,40 @@
 
 @optional
 
-/**
- * Return a dictionary of values to be serialized for submission to a remote resource. The router
- * will encode these parameters into a serialization format (form encoded, JSON, etc). This is
- * required to use putObject: and postObject: for updating and creating remote object representations.
- */
-- (NSObject<RKRequestSerializable>*)paramsForSerialization;
-
 /**
  * Must return a new autoreleased instance of the model class ready for mapping. Used to initialize the model
  * via any method other than alloc & init.
  */
 + (id)object;
 
+/**
+ * Return a dictionary of values to be serialized for submission to a remote resource. The router
+ * will encode these parameters into a serialization format (form encoded, JSON, etc). This is
+ * required to use putObject: and postObject: for updating and creating remote object representations.
+ */
+- (NSDictionary*)propertiesForSerialization;
+
+/**
+ * Invoked before the mappable object is sent with an Object Loader. This
+ * can be used to completely customize the behavior of an object loader at the 
+ * model level before sending the request. Note that this is invoked after the
+ * router has processed and just before the object loader is sent.
+ *
+ * If you want to customize the behavior of the parameters sent with the request
+ * this is the right place to do so.
+ */
+- (void)willSendWithObjectLoader:(RKObjectLoader*)objectLoader;
+
 @end
+
+/**
+ * Returns a dictionary containing all the mappable properties
+ * and their values for a given mappable object.
+ */
+NSDictionary* RKObjectMappableGetProperties(NSObject<RKObjectMappable>*object);
+
+/**
+ * Returns a dictionary containing all the mappable properties
+ * and their values keyed by the element name. 
+ */
+NSDictionary* RKObjectMappableGetPropertiesByElement(NSObject<RKObjectMappable>*object);