I am trying to do magic with RestKit and Rails. I am using Rails 3.1.1 and RestKit 0.9.3 (and not the main branch). I use Core Data in my iOS application, so I'm trying to configure the application to use as much RestKit magic as possible to interact with the rails application.
However, I had a problem trying POST to create a new object for my server to be created. I successfully get'ed objects down. Here is my code:
RKObjectManager* manager = [RKObjectManager objectManagerWithBaseURL:@"http://IP_ADDRESS"]; manager.objectStore = [RKManagedObjectStore objectStoreWithStoreFilename:@"magikarp.sqlite"]; manager.client.requestQueue.showsNetworkActivityIndicatorWhenBusy = YES; manager.acceptMIMEType = RKMIMETypeJSON; manager.serializationMIMEType = RKMIMETypeJSON; /// /// Setup Routing /// RKObjectRouter *router = [[RKObjectRouter alloc] init]; [router routeClass:[List class] toResourcePath:@"/lists/(listID)"]; [router routeClass:[List class] toResourcePath:@"/lists" forMethod:RKRequestMethodPOST]; manager.router = router; /// /// Setup mapping for my "List" object; a subclass of NSManagedObject /// RKManagedObjectMapping *listMapping = [RKManagedObjectMapping mappingForClass:[List class]]; listMapping.primaryKeyAttribute = @"listID"; [listMapping mapAttributes:@"title", nil]; [listMapping mapKeyPath:@"id" toAttribute:@"listID"]; [manager.mappingProvider setMapping:listMapping forKeyPath:@"list"];
This seems to work well for me. Now I want the POST of the newly created object to return to the server.
- (void)createList:(NSString *)listName { List *newList = [List object]; newList.title = listName; [[RKObjectManager sharedManager] postObject:newList delegate:self]; }
I call this method with the name I want the new list to have. This method is called, but I get this error:
2011-12-06 19:24:17.822 Magikarp[13921:14c1b] W restkit.object_mapping:RKObjectMapper.m:74 Adding mapping error: Could not find an object mapping for keyPath: '' 2011-12-06 19:24:17.823 Magikarp[13921:14c1b] E restkit.network:RKObjectLoader.m:190 Encountered errors during mapping: Could not find an object mapping for keyPath: '' 2011-12-06 19:24:17.823 Magikarp[13921:14c1b] Hit error: Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 "Could not find an object mapping for keyPath: ''" UserInfo=0x6bb9da0 {=RKObjectMapperKeyPath, NSLocalizedDescription=Could not find an object mapping for keyPath: ''}
An attempt made to get the mapping made was as follows:
RKObjectMapping *listSerializationMapping = [RKObjectMapping mappingForClass:[NSMutableDictionary class]]; [listSerializationMapping mapKeyPath:@"title" toAttribute:@"title"]; [listSerializationMapping mapKeyPath:@"ListID" toAttribute:@"id"]; [manager.mappingProvider setSerializationMapping:listSerializationMapping forClass:[List class]];
(This gives the above error). I know that there is a pretty simple way to do this, but none of the examples have this code, and all the documentation seems outdated ... Do I need to send information as POST parameters? Help will be appreciated, thanks!
Update
This is the server response - it works, but it seems that the parameters are a bit confused? (The name I recorded was: “Made with iPhone 2!”)
Started POST "/lists" for 129.21.86.32 at 2011-12-07 09:34:43 -0500 Processing by ListsController#create as JSON Parameters: {"id"=>0, "title"=>"Made from the iPhone 2!", "list"=>{"id"=>0, "title"=>"Made from the iPhone 2!"}} WARNING: Can't verify CSRF token authenticity WARNING: Can't mass-assign protected attributes: id (0.3ms) BEGIN SQL (0.9ms) INSERT INTO "lists" ("created_at", "title", "updated_at") VALUES ($1, $2, $3) RETURNING "id" [["created_at", Wed, 07 Dec 2011 14:34:43 UTC +00:00], ["title", "Made from the iPhone 2!"], ["updated_at", Wed, 07 Dec 2011 14:34:43 UTC +00:00]] (16.4ms) COMMIT Completed 201 Created in 77ms (Views: 1.8ms | ActiveRecord: 21.9ms)